Question

if the measure of three angle of a quadrilateral are 100°,120°and 85°,then measure of its fourth angle is​

Answer 1

Answer:

Three angles are = 100 degree, 120 degree, 85 degree

Fourth angle is = 360 - (100 + 120 + 85)

= 360 - 305

= 55 degree.

Ans. 55 degree.

Step-by-step explanation:

Sum of four angles is 360 degree. Now, three angles are given so, we will get the fourth angle by subtracting the sum of three angles from 360 degree. In this way we got the measure of the fourth angle.

Hope it helps.