Can anyone me with thr angle sum theoroem or the trianlge sum theroum?

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?