Question

ABCD is a rectangle.
Angle DCE = 130⁰
Find angles of triangle OAB.​

Answer 1

Answer: 50 degrees

Step-by-step explanation:

Angle DCE = 130 degrees

So angle DCO = 180- 130 = 50 degrees ( straight line = 180 degrees)

angle BCO = 90-50  = 40 degrees ( all angles of rectangle are 90 degrees)

angle B = 90 degrees

angle B + angle BCO + angle BAO = 180 degrees ( angles of triangle)

90 +40 + angle BCO = 180

angle BCO = 180 -90 -40 = 50 degrees