Question

If 3 angles of a quadrilateral are equal & each is 80 degree .Find the measure of the 4 angle

Answer 1

Sum of all the angles in a quadrilateral=360⁰

Let the 4th angle =x

By the problem,

80⁰+80⁰+80⁰+x⁰=360⁰

240+x=360

x=360-240

x=120⁰

Therefore 4th angle is 120⁰.

Answer 2

Answer:

320 is the correct answer