Classify each quadrilateral below with its best name.

Slides:

Advertisements

Similar presentations

Ch 6.1 The Polygon Angle-Sum Theorems Objectives: a) To classify Polygons b) To find the sums of the measures of the interior & exterior  s of Polygons.

Advertisements

Chapter 24 Polygons.

Review The lengths of three sides of a triangle are given. Classify the triangle , 12, , 10, , 15, 26 equilateral scalene isosceles.

By: Raymond Hummon. Polygon What is a Polygon? A Polygon is a closed plane figure bounded by three or more line segments.

Polygons & Quadrilaterals

Interior angles of polygons This is just one of the six interior angles of this polygon.

6-1 The Polygon Angle-Sum Theorems

6.14 Polygons The student will identify, classify, and describe the characteristics of plane figures, describing their similarities, differences, and defining.

8.1.1 Find Angle Measures in Quadrilaterals Chapter 8: Quadrilaterals.

Geometry Review.

Triangles and Polygons

Polygons Triangles and Quadrilaterals. What is a polygon? Closed figure At least 3 sides Line segments are sides Sides meet is call a vertex.

Warm-up Homework out on desks, ready to be checked Prepare a sheet for notes, with the heading: Triangles and Quadrilaterals VOICE LEVEL ZERO.

1.6 Classify Polygons. Identifying Polygons Formed by three or more line segments called sides. It is not open. The sides do not cross. No curves. POLYGONS.

Polygons Polygons Simple, Simple, Closed figure Closed figure Made up of line segments Made up of line segments.

Polygons Lesson What is a polygon? A polygon is a simple, closed, two-dimensional figure formed by three or more line segments (sides). Closed?

Do Now ChalkUp “Quadrilateral Review”. 3/17/ C Polygons.

By Mr. Dunfee THE SUM OF THE ANGLES OF A TRIANGLE IS 180 DEGREES.

The Polygon Project by Connor. Definition A polygon is a shape with 3 or more sides Poly means how many and gon means angles in the language of Greece.

Notes Over Classifying Polygons A polygon with three sides is a _____________. Classifying triangles by angles. Acute Triangle 3 acute angles Right.

Lesson 2 Geometry Review.

8.2 Angles in Polygons Textbook pg 417. Interior and Exterior Angles interior angles exterior angle.

Angles-Polygons-Triangles- Quadrilaterals Angles If two lines cross we say they INTERSECT. If two lines in the same plane do not intersect, we say they.

The sum of the angles of a triangle is always 180 degrees.

1-6 Classify Polygons.

Reviewing angles and polygons

By Mr. Dunfee Be sure to take these notes, or you will not be able to work at the computer.

Interior angles of polygons This is just one of the six interior angles of this polygon.

8 th Grade Math POLYGONS. A polygon is a plane figure with at least three straight sides and angles, and typically five or more. WHAT IS A POLYGON?

Geometry In this lesson we revisit all the main rules and terms of line and triangle geometry. We then try and calculate some angles. In the first part,

Polygon Closed plane figure with at least three sides The sides intersect only at their endpoints No adjacent sides are collinear To name a polygon –Start.

J.Byrne Types of Triangles pg 1  The sum of the angles in any triangle is 180°  Equilateral Triangle  3 sides and 3 angles are equal  Isosceles.

Classifications Bowen’s Class. Quadrilateral Any four sided polygon Any four sided polygon.

CLASSIFYING POLYGONS Unit 1 Lesson 6. Classifying Polygons Students will be able to: Identify the 2-dimensional shapes based on their properties. Key.

Polygon Worksheet 1. Concave Polygon Convex Polygon.

Interior angles of polygons

Section 9.2 Polygons.

Geometry Shapes J.Byrne 2017.

etryandmeasurement/polygons/

180o Scalene Triangle 60o Isosceles Triangle

Polygons – Measurements of Angles

Triangle Vocabulary Equilateral:

Polygons 3 triangle 8 octagon 4 quadrilateral 9 nonagon pentagon 10

Interior angles of polygons

Y8 Polygon Workbook.

Ms. Brittany Uribe Geometry

Angles of Polygons.

Angle Relationships in Polygons

Do Now: What is the distance between (1, -3) and (5, -4)?

Polygons By Beth Roberts.

Section 9.2 Polygons.

Polygons TeacherTwins©2015.

Triangles TeacherTwins©2014.

Classifying Polygons.

Polygons What? Closed figure; 3 or more line segments that do not cross Name a Polygon Count the number of sides 3 - Triangle 4 - Quadrilateral.

Exploring Polygons.

Classify Quadrilaterals

Classify Polygons Name: ____________________________________

Polygons, Triangles and Quadrilaterals

Geometry Benchmark Flashcards

Attributes Straight sides Closed figure 3 or more sides

Book of Geometric Figures - Project Grade

Review basic names, properties and areas of polygons.

Geometrical Construction

Classifying Polygons.

Polygons and Angles Sec 12 -1E pg

Section 6.1 Polygons.

Geometry Vocabulary.

Presentation transcript:

2 1 4 3 6 5 Classify each quadrilateral below with its best name. rhombus 1 Isosceles Obtuse Triangle 4 3 rectangle Scalene Right Triangle trapezoid 6 5 Acute Equilateral Triangle

Ch. 7-5 Angles and Polygons

Ch. 7-5 Angles and Polygons Here is a list of Common Polygons: Polygon Name Number of Sides Triangle 3 Quadrilateral 4 Pentagon 5 Hexagon 6 Heptagon 7 Octagon 8 Nonagon 9 Decagon 10 Dodecagon 12

-Two consecutive sides of a polygon form one interior angle -Two consecutive sides of a polygon form one interior angle. The sum of the measures of the interior angles depends on the number of sides. -For a polygon with n sides, the sum of the measures of the interior angles is (n – 2)1800 Example 1: Find the sum of the measures of the interior angles of each figure below. Remember to use the formula. a.) nonagon b.) heptagon A nonagon has 9 sides so plug in 9 for n (9 – 2)180 = 7(180) = 1,2600 A heptagon has 7 sides so plug in 7 for n (7 – 2)180 = 5(180) = 9000

Example 2: Find the missing angle measure in the figures below. a. First find the sum of the measures of the interior angles. (5 – 2)180 = 5400 1300 920 750 Now add up all of the angle measures that you know and subtract it from 5400 to find out the measure of the missing angle. 130 + 75 + 102 + 92 = 399 540 – 399 = 1410 1020 x0 b.) A hexagon has 5 angles with measures of 1420, 840, 1230, 900, and 1300. What is the measure of the 6th angle? First find the sum of the measures of the interior angles. (6 – 2)180 = 7200 Now add up all of the angle measures that you know and subtract it from 7200 to find out the measure of the missing angle. 142 + 84 + 123 + 90 + 130 = 569 720 - 569 = 1510

-A regular polygon is a polygon with all sides congruent and all angles congruent. -To find the measure of each angle of a regular polygon, divide the sum of the angle measures by the number of angles. Example 3: Find the measure of each angle for the regular polygons below. a.) a regular octagon b.) a regular decagon First find the sum of the measure of the interior angles: (8 – 2)180 = 10800 First find the sum of the measure of the interior angles: (10 – 2)180 = 14400 Now divide 1080 by 8. Therefore every angle in a regular octagon is 1350 Now divide 1440 by 10. Therefore every angle in a regular dodecagon is 1440

HW – Pg. 326 Problem #’s 1-5 all, 8-20, 24-28 even