Question

Three angles of quadrilateral are equal.The fourth angle is of measure 150 what is measure of equal angles

Answer 1

Let equal angles be <a and fourth angle be <b
Therefore 3<a + <b =360 degree
3<a + 150 degree = 360 degree
3<a = 210 degree
<a = 70 degree
so all three equal angles will be 70 degree of each

Answer 2

Let equal angles each be x

Using angle sum property!
x+x+x+ 150 = 360
3x = 360- 150 = 210
X= 70

Each equal angle = 70