Question

A quadrilateral it has tow right angles the third interior angle measures 20 less than the fourth angle find the measure of all interior angles

Answer 1

Sum of interior angles of a quadrilateral is 360 degree.
given 2 angles are 90 degree.
also given third interior angle measures 20 less than the fourth angle.
so let x be the fourth angle then third angle is x-20.
Therefore
90+90+x-20 +x = 360
2x+160=360
2x =360-160
2x=200
x=100
therefore fourth angle is 100 and third angle is x-20=80.