Question

llgm abcd if angle a is 4/5 of angle b and find angle a

Answer 1

Answer:

Let the angle A of llgm be =x

then,

angle B=4/5x

angle A+angle B=180degree(By co-interio)

X+4/5x=180degree

=>9x/5=180degree

=>9x=180×5

=>x=100degree

angle A=100degree

angle B=4/5x=80degree(Ans).