HOUR Picture: Definition: MATH Grades 3-5 Unit 4 HOUR Definition: An hour is a unit of time — it's sixty minutes, 3,600 seconds, or the length it takes the long hand on your watch to move in a full circle. Picture: Example: We just got back an hour ago.

HALF-HOUR Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A half of an hour – it’s thirty minutes, or the length it takes the long hand on your watch to move half a circle. Picture: Example: We haven’t been out of the house for a half-hour.

QUARTER HOUR Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A quarter of an hour – it’s fifteen minutes, or the length it takes the long hand on your watch to move a quarter of a circle. Picture: Example: Within a quarter hour the tech will be here to get you.

MINUTE Picture: Definition: MATH Grades 3-5 Unit 4 MINUTE Definition: A unit of time equal to 60 seconds or 1/60th of an hour. Picture: Example: He listened for a minute and then he became angry.

SECONDS Picture: Definition: 1/60 of a minute. Example: MATH Grades 3-5 Unit 4 SECONDS Definition: 1/60 of a minute. Picture: Example: For a second, she thought he was going to smile.

ELAPSED TIME Picture: Definition: MATH Grades 3-5 Unit 4 Definition: The time that elapses while some event is occurring. Picture: Problem: Haley watched a fireworks show. The first firework went off at 8:15. She watched until the show ended 20 minutes later. What time was it when the fireworks show ended?

AREA Picture: Definition: MATH Grades 3-5 Unit 4 AREA Definition: The area of a flat, or plane  figure is the number of unit squares that can be contained within it. Picture: Problem: Find the area of a square with each side measuring 5 inches.

ATTRIBUTE Picture: Definition: MATH Grades 3-5 Unit 4 ATTRIBUTE Definition: A property of an object or person etc.  Something you can say it has (such as size or color). Picture: Example: The attributes of a dog include height, speed and color.

HEPTAGON Picture: Definition: MATH Grades 3-5 Unit 4 HEPTAGON Definition: A 7-sided polygon (a flat shape with straight sides). Picture: Example:

HEXAGON Picture: Definition: MATH Grades 3-5 Unit 4 HEXAGON Definition: A 6-sided polygon (a flat shape with straight sides). Picture: Example:

OCTAGON Picture: Definition: MATH Grades 3-5 Unit 4 OCTAGON Definition: An 8-sided polygon (a flat shape with straight sides). Picture: Example:

PARALLEL Picture: Definition: MATH Grades 3-5 Unit 4 PARALLEL Definition: Always the same distance apart and never touching. Picture: Example:

PARALLELOGRAM Picture: Definition: Example: MATH Grades 3-5 Unit 4 A 4-sided flat shape with straight sides where opposite sides are parallel. Also: • opposite sides are equal in length, and • opposite angles are equal (angles "a" are the same, and angles "b" are the same) Picture: Example:

PENTAGON Picture: Definition: MATH Grades 3-5 Unit 4 PENTAGON Definition: A 5-sided polygon (a flat shape with straight sides). Picture: Example:

POLYGON Picture: Definition: Example: MATH Grades 3-5 Unit 4 A plane shape (two-dimensional) with straight sides. Examples: triangles, rectangles and pentagons. (Note: a circle is not a polygon because it has a curved side) Picture: Example:

QUADRILATERAL Picture: Definition: MATH Grades 3-5 Unit 4 QUADRILATERAL Definition: A flat shape with four straight sides. Picture: Example:

RECTANGLE Picture: Definition: Example: MATH Grades 3-5 Unit 4 A 4-sided flat shape with straight sides where all interior angles are right angles (90°). Also opposite sides are parallel and of equal length. Example: A square is a special type of rectangle. Picture: Example:

RHOMBUS Picture: Definition: Example: MATH Grades 3-5 Unit 4 A 4-sided flat shape with straight sides where all sides have equal length.  Also opposite sides are parallel and opposite angles are equal. It is a type of parallelogram. Picture: Example:

RIGHT ANGLE Picture: Definition: MATH Grades 3-5 Unit 4 Definition: An angle which is equal to 90°, one quarter of a full revolution. Picture: Example:

ACUTE Picture: Definition: An angle less than 90° Example: MATH Grades 3-5 Unit 4 ACUTE Definition: An angle less than 90° Picture: Example:

OBTUSE Picture: Definition: MATH Grades 3-5 Unit 4 OBTUSE Definition: An obtuse angle is one which is more than 90° but less than 180° In other words, it is between a right angle and a straight angle. Picture: Example:

RAY Picture: Definition: MATH Grades 3-5 Unit 4 RAY Definition: A line with a start point but no end point (it goes to infinity). Picture: Example:

STRAIGHT ANGLE Picture: Definition: Example: MATH Grades 3-5 Unit 4 A straight angle changes the direction to point the opposite way. It looks like a straight line. It measures 180° (half a revolution, or two right angles) Picture: Example:

LINE SEGMENT Picture: Definition: Example: MATH Grades 3-5 Unit 4 The part of a line that connects two points. It has definite end points. Adding the word "segment" is important, because a line normally extends in both directions without end. Picture: Example:

SQUARE Picture: Definition: Example: MATH Grades 3-5 Unit 4 A 4-sided flat shape with straight sides where: • all sides have equal length, and • every interior angle is a right angle (90°) It is a Quadrilateral and a Regular Polygon. Picture: Example:

TANGRAM Picture: Definition: Example: MATH Grades 3-5 Unit 4 A traditional Chinese puzzle made of a square divided into seven pieces (one parallelogram, one square and five triangles) that can be arranged to match particular design. Picture: Example:

TRAPEZOID Picture: Definition: Example: MATH Grades 3-5 Unit 4 A 4-sided flat shape with straight sides that has a pair of opposite sides parallel. The sides that are parallel are called "bases". The other sides are "legs" (which may or may not be parallel). Picture: Example:

TRIANGLE Picture: Definition: MATH Grades 3-5 Unit 4 TRIANGLE Definition: A 3-sided polygon (a flat shape with straight sides). Picture: Example:

DIAGONAL Picture: Definition: Example: MATH Grades 3-5 Unit 4 A straight line inside a shape that goes from one corner to another (but not an edge). So when we join any two corners (called "vertices") of a polygon which are not already joined by an edge, we get a diagonal. Picture: Example:

PERIMETER Picture: Definition: Example: MATH Grades 3-5 Unit 4 The distance around a two-dimensional shape. Example: the perimeter of this rectangle is 3+7+3+7 = 20 The perimeter of a circle is called the circumference. Picture: Example:

REGULAR POLYGON Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A polygon is regular when all angles are equal and all sides are equal (otherwise it is "irregular"). Picture: Example:

TESSELLATE Picture: Definition: MATH Grades 3-5 Unit 4 TESSELLATE Definition: Cover (a plane surface) by repeated use of a single shape, without gaps or overlapping. Picture: Example:

TETROMINO Picture: Definition: MATH Grades 3-5 Unit 4 TETROMINO Definition: A tetromino is a geometric shape composed of four squares, connected orthogonally. Picture: Example:

BAR GRAPH Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A graph drawn using rectangular bars to show how large each value is.  The bars can be horizontal or vertical. Picture: Example:

DATA Picture: Definition: Example: MATH Grades 3-5 Unit 4 A collection of facts, such as numbers, words, measurements, observations or even just descriptions of things. Here we have a table of data from a survey of "What sport do you play?" Picture: Example:

FRACTION Picture: Definition: Example: MATH Grades 3-5 Unit 4 Part of a whole.  • the bottom number (the denominator) says how many parts the whole is divided into  • the top number (the numerator) says how many parts we have. Picture: Example:

LINE PLOT Picture: Definition: Example: MATH Grades 3-5 Unit 4 A line plot is a graph that shows frequency of data along a number line. It is best to use a line plot when comparing fewer than 25 numbers. It is a quick, simple way to organize data. Picture: Example:

PICTURE GRAPH Picture: Definition: Example: MATH Grades 3-5 Unit 4 A picture graph is a pictorial display of data with symbols, icons, and pictures to represent different quantities. The symbols, icons, and pictures of a picture graph typically represent concepts or ideas, or stand in for a larger quantity of something. Picture: Example:

SCALE Picture: Definition: Example: MATH Grades 3-5 Unit 4 The ratio of the length in a drawing (or model) to the length of the real thing Example: in the drawing anything with the size of "1" would have a size of "10" in the real world, so a measurement of 150mm on the drawing would be 1500mm on the real horse. Picture: Example:

SURVEY Picture: Definition: MATH Grades 3-5 Unit 4 SURVEY Definition: To gather information by individual samples so as to learn about the whole thing. Picture: Examples: You could survey a river's water quality by taking a cupful of water from different random locations at different times. You can do a survey on people's opinions, by asking randomly chosen people the same questions.

KEY Picture: Definition: MATH Grades 3-5 Unit 4 KEY Definition: A list or note that explains the meaning of each symbol on a graph or explanation on a pictograph to show how many each picture stands for. Picture: Example:

SCALED GRAPHS Picture: Definition: Example: MATH Grades 3-5 Unit 4 Scale (on a graph) The scale is what you mark on the axes. It's the relation between the units you're using, and their representation on the graph i.e., the distance between marks. Picture: Example:

CUP ( C ) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: The cup is a unit of measurement for volume, used in cooking to measure liquids. Picture: Example:

CUSTOMARY UNIT Picture: Definition: Example: MATH Grades 3-5 Unit 4 A system of measurement where length is measured in inches, feet, yards, and miles; capacity in cups, pints, quarts, and gallons; weight in ounces, pounds, and tons; and temperature in degrees Fahrenheit. Picture: Example:

GALLON (gal) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A customary unit of volume for liquid measure. 1 gallon = 4 quarts. Picture: Example:

METRIC UNIT Picture: Definition: MATH Grades 3-5 Unit 4 Definition: The definition of analysis is the process of breaking down a something into its parts to learn what they do and how they relate to one another. Picture: Synonyms: Examination Investigation Inspection Survey Study

OUNCE (oz) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: Imperial measure of weight. Abbreviated as oz. Equivalent to 28.35 grams. Picture: Example:

POUND (lb) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A unit of mass (or weight) defined as 0.454 kg. Picture: Example:

QUART (qt) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A unit of volume in Customary System. There are 4 quarts in 1 gallon. Picture: Example:

CAPACITY Picture: Definition: Example: MATH Grades 3-5 Unit 4 The amount that something can hold.  Usually it means volume, such as milliliters (ml) or liters (l) in Metric, or pints or gallons in Imperial. Example: "The bucket has a capacity of 9 liters.” Picture: Example:

CONVERT Picture: Definition: MATH Grades 3-5 Unit 4 CONVERT Definition: A change in the form of a measurement, different units, without a change in the size or amount. Picture: Example:

DISTANCE Picture: Definition: MATH Grades 3-5 Unit 4 DISTANCE Definition: Distance is the space between two objects or points. Picture: Example:

FOOT (ft) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A unit of length in the customary system. 1 foot = 12 inches, 1 foot = 30.48 centimeters. Picture: Example:

GRAM (g) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A metric unit of mass (weight). 1,000 grams = 1 kilogram . Picture: Example:

INCH (in) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: The smallest unit of length in the customary system. 1 inch = 2.54 centimeters. Picture: Example:

KILOGRAM (kg) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A metric measure of mass abbreviated as kg. 1 kg = 1,000 grams. Picture: Example:

LITER (L) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A metric unit of volume mostly used to measure liquids. The abbreviation is L. 1 liter (L) = 1,000 milliliters (ml). Picture: Example:

MILLILITER (mL) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A metric unit used to measure capacity, which is equivalent to 1/1,000 of 1 liter. Picture: Example:

METER (m) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: The standard unit of length in the metric system. 1 meter = 100 centimeter. Picture: Example:

YARD (yd) Picture: Definition: MATH Grades 3-5 Unit 4 Definition: A unit of linear measurement in the customary system equal to 3 feet (36 inches). Picture: Example: