Answer:
11 & 12 = 19⁰
13 = 71⁰
14, 15, 16 & 17 = 90⁰
18 & 20 = 78⁰
19 = 12⁰
Explanation:
14,15,16 and 17 are formed from perpendicular lines. They are not counted as angles for the kite because, the are in the middle of the kite, not at the side...
You can easily find the angles using the triangle angles formula...to find 12,
180 - 90 - 71 = 19
To find 20 & 18, with the same method,
180 - 90 - 12 = 78