Question

13. What is the value of the missing angle (first picture)

1. 50°
2.60°
3.100°
4.240°
~
14. What is the value of the missing angle? (second picture)
1.129°
2.153°
3.169°
4.720°

Answer 1

13) You have:

1. To calculate the sum of the interior angles of a polygon, you must apply the following formula:

(n-2)180°

2. So, you have:

(5-2)180°=540°

3. Therefore:

x+150°+150°+90°+90°=540°
x=540°-150°-150°-90°-90°
x=60°

14) 1. You must apply the formula for calculate the sum of the interior angles of a polygon:

(n-2)180°
(6-2)180°=720°

2. Then, you have:

x+75°+151°+75°+115°+135°=720°
x=169°