### Home > INT2 > Chapter 2 > Lesson 2.1.2 > Problem 2-21

2-21.

a. | b. | c. | d. |

Multiply the left and right squares, and place the product in the top square.

The bottom square consists of the sum of the left and right squares.

2-21.

a. | b. | c. | d. |

Multiply the left and right squares, and place the product in the top square.

The bottom square consists of the sum of the left and right squares.