Question:
Two angles of a quadrilateral are 80 and 135 degrees.The other two angles are equal.Find the other two angles.
Answer:
Let the other two angles are x and x.
Weknow that the sum of all angles in a quadrilateral = 360
=> 80 + 135 + x + x = 360
=> 215 + 2x = 360
=> 2x = 360 - 215
=> 2x = 145
=> x = 145/2
=> x = 72.5
So, the other two angles are 72.5 degree and 72.5 degree
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