This polygon has 4 sides 180(4-2) = 180(2) = 360 degree 80+90+2x + 3x = 360 170+5x = 360 5x = 190 x= 38 measure of angle t is 2(38)= 76 the answer is c. trust me hope this !
Willard f. libby received his undergraduate degree from . after he completed his graduate work, he became a professor at . in 1960, he won a nobel prize in .