The area of a square is 144 square centimeters.
what is the length of one side of the square?

A = a^2A = area and a is length of one side

144 = a^2 take the sqrt of both sides, eliminating the ^2 on the right
sqrt 144 = a
12 = aso one side is 12 cm

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 !