Question

What is m∠A?

Answer 1

45 degrees.
One angle measures 32.
So subtract that from 180.
148.
Then you have another angle that equals 77. subtract that from 180 to get its supplementary friend next to it 180 - 77 = 103.
subtract that from 148.
148 - 103 = 45.
Make sense?

Answer 2

Subtract:

You know that the whole thing is 180, so subtract 77 to get the interior angle
Then add the rest to find the remaining

Answer 3

Yes thank you