Angles in a polygon

What is the formula for the sum of the interior?

• S=360
• S=(n-2)180
• n=360/ext. angle
• 1 int. angle + 1 ext. angle=180

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

• 1440°
• 900°
• 1080°
• 1260°

What is the SUM of the angle measures in a hexagon (6 sides)?

• 720°
• 1080°
• 600°
• 540°

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

• 60°
• 90°
• 120°
• 180°

Tags

CCSS.8.G.A.5

Find the value of X

• 94
• 25
• 36
• 180

Work out the missing angle

• 92

• 88

• 103

• 360

Find the value of the missing angle

• 96

• 86

• 120

• 116

Work out the size of one interior angle of this regular hexagon

• 120

• 720

• 100

• 360