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GEOMETRY
Grade 3

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Hello, How are you doing?

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Solid Figures
2-dimensional figure – A figure that has only length and width.
Example: square, rectangle, circle
3-dimensional figure – A figure that has length, width and height.
Example: cube, cone
Circle
Cube

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2-dimensional figure
Square: 4 sides and 4 angles. All sides are equal.
Rectangle: 4 sides and 4 angles. Opposite sides are equal.
Triangle – 3 sides and 3 angles.

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3- dimensional figures
Rectangular Prism
Cylinder
Vertex
Flat Face
Straight Edge
Curved Edge
Curved face

6. What is the shape of the orange Juice shown in the figure?
Answer- Cylinder
Orange
Juice

7. Lines and Line-segments
Line – A straight path that goes in two directions without ends.
Line Segments – Lines that stay the same distance apart from each other.

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Name each figure.
A B C
Answer- a) Triangle
b) Rectangular Prism
c) Line

9. Intersecting and Parallel lines
Intersecting lines – lines that meet or cross at a common point.
Parallel lines – lines that stay the same distance apart from each other. They do not cross.
Intersecting Lines
Parallel lines

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Ray
A ray is a straight line.
It has one end point and goes on without end in 1 direction.

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Angles
An angle is formed by 2 rays with the same end point.
Right Angle – A right angle forms a square corner.

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Polygon
Polygon is a closed figure with straight sides.
Example: hexagon, pentagon, octagon
Closed figure but not a polygon
Polygon

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Polygon
A pentagon has 5 sides and 5 angles.
A hexagon has 6 sides and 6 angles.
An octagon has 8 sides and 8 angles.
Hexagon Pentagon Octagon

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Identify and Draw each Polygon a) It has 3 sides. b) It has 4 sides. All are equal.
Answer –
Triangle
Square or Rhombus
Triangle Square

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Quadrilateral
A closed figure with four sides.
Example: Rectangle, square, Trapezium, Rhombus
Parallelogram – Quadrilateral having both pair of opposite sides parallel.
Trapezoid – Quadrilateral having only one pair of parallel sides.
Trapezoid
Parallelogram

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Nick made a pentagon using 5 toothpicks. He now wants to change pentagon to octagon. How many more toothpicks does he need?

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Bob makes two different quadrilaterals with 4 equal sticks. What two quadrilaterals did he make?

18. Draw a) ray b) Parallel lines

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ASSESSMENT

21. How many Crayons do we need to draw a) Hexagon b) Square

22. 2. Identify each Quadrilateral
A B C

23. 3. Which among the following is a polygon?
A B C D

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4. Name each figure
A B C

25. 5. Alex drew a square. How many right angles did he draw?

26. How many sides does each figure has? a) Rhombus b) Triangle

27. 7. What kind of lines are in the alphabet X ?

28. 8. Circle the 2-dimensional figures.
A B C D E

29. 9. Name all the shapes in the figure?

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10. Mike traced around the bottom of a box shaped like the, rectangular prism( figure shown). What shape did Mike draw?

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Good Work!
Remember to do practice worksheets on the Lesson.