Answer:
m∠B is 55°.
Step-by-step explanation:
Given,
AD║CB
AB║CD
∠A = 125°
We have to find ∠B.
Solution,
Since AD║CB and AB║CD.
So we can say that the given figure is a parallelogram.
And according to the property of parallelogram, each pair of consecutive angles are supplementary.
So we can frame it as;
[tex]\angle A+\angle B=180\°[/tex]
Now we substitute the given value and get;
[tex]125\°+\angle B=180\°\\\\\angle B=180\°-125\°\\\\\angle B=55\°[/tex]
Hence m∠B is 55°.
