Unit 5 - Summary

The sum of the exterior of a polygon is ...... .

The sum of the interior angles of a polygon with N sides is ....... .

Work out the unknown angle.

• 105

• 75

• 85

Work out the unknown angle.

• 102

• 72

• 78

Work out the unknown angle.

• 112

• 68

• 78

Work out the exterior angle of a regular hexagon.

A regular polygon has an interior angle of 144. Work out the number of sides.

How many sides does a regular polygon have if it has an exterior angle of 20.

Work out the sum of interior angles of a heptagon.

• 540

• 720

• 900

• 1080

Find the value of an unknown angle.

• 67

• 123

• 117

• 113