What is the rule to. it is a two part sich as double it and subtract

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Meg constructed triangle poq and then used a compass and straightedge to accurately construct line segment os, as shown in the figure below, which could be the measures of angles pos and angle poq?

Write the point-slope form of an equation of the line through the points (-2, -3) and (-7, 4).