Question

In a Pentagon ABCDE. angle A=110 and B =140 and angle D=angleE. The sides of AB and DC has produced to meet at right angle. Calculate angle BCD AND angle E

Answer 1

<d=<e=x

<a+<b+<c+<d+<e=540

110+140+90+2x=540

340+2x=540

2x=540-340

2x =200

x=200\2

x=100

<e=100