Alejandro reduced triangle a proportionally.

he made each side 1/2 as long.

use the drop-down menus to complete the statements below.

(1) Each side of triangle A is changed by a factor of 1/2.

(2) The unknown side length in triangle B has a measure of 7.5 units.

Step-by-step explanation:

It is given that Alejandro reduced triangle A proportionally.

It means triangle A and B are similar and their corresponding sides are proportional.

From the given figure it is clear that the side of length 12 units is reduce to 6 units.

Each side of triangle A is changed by a factor of 1/2.

Let the unknown side of triangle B be x.

On cross multiplication we get

Divide both sides by 2.

Therefore, the unknown side length in triangle B has a measure of 7.5 units.