Question

Please thank you for help

Answer 1

1. 67.5°

2. 12 sides

Explanation:

1. interior angle of regular octagon: 180° x (8 - 2) = 1080°

each interior angle : 1080° / 8 = 135°

∠x = 1/2 x 135° = 67.5°

2. sides of regular polygon = 360/m of exterior angle

360 / 30 = 12