Question

find x in the following figure

Answer 1

Answer:

<E(inside)=180-90=90

<D(inside)=180-60=120

<C(inside)=180-x

<B(inside)=180-40=140

<A(inside)=90,

since sum of all interior angle should 540{(we know, sum of interior angle=(n-2)*180}

• 90+120+180-x+140+90=540
• 620-540=x
• x=80