Question

The interior angle of a pentagon are 100°,x°,(3x+30)°,(2x-10)° and 80°. Find x

Answer 1

Step-by-step explanation:

Sum of all interior angle in pentagon = 540

100°+X°+(3x+30)+(2x-10)°+80°=540°

200+6x= 540

x=340÷6

x = 56.66