Which unit of measure would be appropriate for the area of a picture that is 20 centimeters tall and 15 centimeters wide

square centimeters

Step-by-step explanation:

Hi, the answer to the question is square centimeters.

The lengths of the picture are in centimeters. So, when you calculate the area of the picture that is a triangle you obtain square centimeters.

Mathematically speaking:

20cm x 15 cm =  300 square centimeters

By multiplying the same unit you obtain the square unit.

Feel free to ask for more if it´s necessary or if you did not understand something.

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign