Question

three angle of a quadrilateral are equal. if the forth angle is 240degree, find the magnitude of each of the equal angel​

Answer 1

Let the 3 unknown angles=x

As we know,sum of all the 4 angles of quadrilateral=360⁰

So,x+x+x+240=360⁰

3x=360-240⁰

3x=120⁰     x=120÷3=40⁰

Therefore,all the angles of quadrilateral=40⁰,40⁰,40⁰ & 240⁰