Matemáticas 3 grado mayor a menor

Working on itts i’m going to need you to me as i go along 1-5

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?