Help please hurry and

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)?

What is the perimeter of an equilateral triangle if each side is (x+3)?

Someone me! will award brainliest if u explain and answer!