Find Angle Measures and Sides of Polygons

What is the SUM of the angle measures in a nonagon (9 sides)?

• 1440°

• 900°

• 1080°

• 1260°

What is the measure of ONE interior angle in a regular pentagon (5-sides)?

• 90°

• 108°

• 120°

• 180°

What is the measure of ONE interior angle in a regular hexagon (6 sides)?

• 60°

• 80°

• 108°

• 120°

Find the value of X

• 94

• 25

• 36

• 180

Find the measure of the indicated angle.

• 35

• 145

• 78

• 67

Tags

CCSS.8.G.A.5

step 1: set up an equation

step 2: Solve for x

step 3: Plug in x for each expression

step 4: Add the two answers from step 3

• 82

• 41

• 17

• 90

Tags

CCSS.HSG.CO.C.11

23.Find m<R

Mathematical Equivalence

ON

Tags

CCSS.HSG.CO.C.11

Find the m∠D

(a)  

Find m<H.

Mathematical Equivalence

ON

What is the SUM of the angle measures in a triangle (3 sides)?

• 60°

• 90°

• 120°

• 180°

Tags

CCSS.8.G.A.5