The angle 1 and the side equal to 72° together equal 180. 72 + x = 180 using the subtraction property of equality we can conclude that x = 108.
Side 2 is parallel with 72° making them equal and Side 3 is parallel with 108° making them equal.
Side 1 = 108°
Side 2 = 72°
Side 3 = 108°
A = r² π
254.469 = r² π
r² = 254.469 : 3.14159
r² = 81.00866
r = 9.0048
C = 2 r π = 2 * 9.0048 * 3.14159 = 56.55 units
Ce clasă ești sa văd daca te pot ajuta
,178. in my head not edtinstoon