Question

Abcd is a trapezium in which ab parallel to dc angle a and b is 30 degrees

Answer 1

Angle a and b are 30 each (given )
Angle a+angle c =180 (co -interior angle)
Simillarly angle b +angle d=180
Therefore angle c and d are 180 -30 each
Angle c=angle d= 150

Answer 2

So the remaining angels will be equalmto 150 degrees as we know that two parallel lines makes co- interior angles which are supplementary that is sum up to 180

So if a is 30 , c is 150

Similarly

B is 30 so d is 150

Thank u★★★
#ckc

We can check also all teh angles sum upmto 360 degrees . Hence answers are verified too.