A right triangle has sides A, B, and C. Side A is the hypotenuse and side B is also a side of a rectangle. Sides A, C, and the side of the rectangle adjacent to side B have lengths of #12 #, #4 #, and #9 #, respectively. What is the rectangle's area?
Area of rectangle,
Applying Pythagoras theorem,
b is also the width of the triangle.