Find the area of the rectangle whose length is 15 cm and the width is 4 cm. Area ABCD Area ABC Area ADC. Image will be uploaded soon Example 2.
The area of a rectangle is equal to its length multiplied by its width.
The diagonal AC divides the rectangle into two equal right angle triangles. Given Length 15 cm. Plug the values for area and length into the formula. The grey space is the area of the rectangle in the diagram below.