Question

The three angles of quadrilateral are equal if the measure of four angles is 140°. What is the measure of other angles?

Answer 1

Let all the three angles of quadrilateral be x.

Fourth angle =140

Sum of the angles =360

x+x+x+140=360

3x+140 =360

3x =360-140

3x =210

x. =210/3

x =70

The measure of the other angles be 70