Area of rectangles and triangles

A square piece of steel, as shown on the right, has a triangular shape stamped out of it.

What is the area of steel that remains?

Solution

Find the area of the triangle on the right.

Solution

Find the area shaded in blue.

Solution

Find the area shaded in blue.

Solution

The back yard of a house has the dimensions shown on the right. Calculate its area.

Solution