Question

ABCD is an isosceles trapezium in which AB||CD find other angles​

Answer 1

Answer:

Dear friend:

extend AB and CD.so angle CBX and angle BCY is formed.so angle BCY=ABC so both are 80 degree.so DCB=180-80=100degree

since it is isosceles trapezium angle D=C,angle A=B.

so the problem is solved.