The sum of all five angles is 540 degrees. A) 4*congruent angles + 5th angle = 540 B) (5th angle) -30 = 2*cong angle
A) 5th angle = 540 -4*cong angle B) 5th angle = 2*(cong angle) -30 Multiplying B) by -1 B) -5th angle = -2*(cong angle) +30 then adding to A) A) 5th angle = 540 -4*cong angle
-2*(cong angle) +30 = 540 -4*cong angle 2*(cong angle) = 510 ***************************************** By trial and error I determined each congruent angle = 95 5th angle = 160
