Messed up twice just want an answer for my stuff the picture is the question

(a) m<3 = 103 degrees

(b) m<4 = 77 degrees.

Step-by-step explanation:

A: The sum of the measures of all three interior angles in a triangle always is 180 degrees. Knowing this, we add the two known interior angles, 20 and 57, then subtract that from 180 to get 103 degrees.

B: The measure of an exterior angle is the sum of the two opposite interior angles. So, we add 57 and 20 to get the m<4 = 77 degrees.

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d

step-by-step explanation:

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