grade level

body of knowledge

idea

benchmark

Use Angle Sum Theorem.

Angle Sum

hw 82

MAFS.8.G.1.5

Name

Date

Period

Assignment

How do I find measures of angles in polygon?

ESSENTIAL QUESTION

**EXIT SLIP**

3 - (-7 ) (-12) - (-10) (-7) - (-9)

On 1/2 piece of paper.

On 1/2 piece of paper.

Explain how to simplify using the Counters Game rules.

ESSENTIAL QUESTION

3

4

_

Cut out a triangle.

Make sure to keep the sides straight.

The two rectangular prisms shown below are similar.

What is the height

of the larger prism?

A. 10.3 inches

B. 18.9 inches

C. 12.6 inches

D. 14.4 inches

Mark each angle (corner).

Sum of the measures of the interior angles of ANY triangle is 180 degrees.

measure of angle A

measure of angle B

+

measure of angle C

180 degrees

Solve for x.

Find the missing angle.

PreAlgebra

Green TEXTBOOK

p 416

Tear off 2 angles.

Put them up with 3rd angle.

What is the sum of the measures of the interior angles of this pentagon?

What is the measure of any one angle?

What is the sum of the measures of the interior angles of this hexagon?

What is the measure of any one angle?

Which set of angles is NOT a triangle?

52, 43, 85

43, 62, 75

26, 49, 105

33, 69, 54

What is the value of x?

105

2x

x

What is the value of x?

(2x - 5)

o

Complete the table.

# of sides polygon sum of angles

3 triangle 180

4

5

6

7

8

9

10

12

Solve each system of equations.

y = x - 4 and y = 2x + 5

y = -3x + 7 and 3x - y = 11

The diameter of Earth is approximately 1.28 x 10 km. The diameter of Jupiter is approximately 1.43 x 10 km. Approximately how many times longer is the diameter of Jupiter than the diameter of Earth?

Simplify (5 x 5 )(5 )

**Find measure of each angle.**

**vertical angles are congruent**

1

2

_

CLASSWORK

wb1 pp 221-227

4

5

2 -3 -2

Axis of symmetry.

**A**

**B**

**C**