Trapezoid qrst has two right angles. a 5in. altitude can be drawn dividing qrst into a rectangle and an isosceles right triangle. the longer side of the rectangle measures 9 in. what is the area of the trapezoid?

If it is isosceles right triangle then , one side of this triangle is the altitude,and another also equals 5 in.

9-5=4 in is the short base,
so A (trapezoid) =(1/2) (9+4)*5=65/2=32.5 in ^2
 

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .