Answer:
a) y = 150°
b) z = 120°
c) Dodecagon
Explanation:
Formula to find the sum of interior angles = (n - 2) × 180
- Here the shape is dodecagon (12 sides polygon).
Here the n (number of sides) is 12
So, sum of interior angles = (12 - 2) × 180 = 1800°
Each interior angle = 1800°/12 = 150°
y = 150°
The square's right angle, y and z sum ups to total 360°.
90° + y + z = 360°
90° + 150° + z = 360°
z = 360° - 240° = 120°