5x + 10 + 58 = 180
5x + 68 = 180 Subtract 68 on both sides
5x = 112 Divide 5 on both sides to get "x" by itself
x = 22.4
The two opposite sides are equal. Therefore, AF // CE and FC // EA
Also, the corner angles should not form right angles. Shape AFCE is a rhombus, thus, similar aspects to that of a diamond, or equilateral quaddritalertial (with parallel line ofc)... I hope I answered your question. Good luck.
-10 < n < 8 is the answer
Https://us-static.z-dn.net/files/d52/7e3594a5c9e0826dee056ea0e1420cb9.jpg
12pi because radius equals to 2 and you have to do 6m*2 equals 2? sorry if its wrong