Expand the form of 87.435

What is the greatest common factor of 8 and 36

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)?

See attachment below and find the equivalent of tan(∠qsr)