Question

three angles of a quadrilateral are 50 degree, 40 degree and 23 degree . Find its fourth angle.

Answer 1

the sum of all angles of a quadrilateral= 180°
=> 50 +40 + 23 + x = 180°
=> x = 67°.

Answer 2

let the 4th angle be x
Acc to angle sum property
angle 1+ angle2 + angle3+ angle4 =180
50 + 40 + 23 +x =180
113+×=180
×=180-113
×=67