Do this i need and show work too you you would be my hero

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.