I need help on this math problem!

20 inches

Step-by-step explanation:

The problem is having you solve for the hypotenuse of a right triangle so you'll use the pythagorean theorem.

12²+16²=400.

√400= 20

20 inches.

Hope this helps!

20 inches

Explanation:

Imagine the two sides to be the length and width of a triangle, and the line he drew as the hypotenuse. Thus, we can use the Pythagorean theorem:

c² = a² + b²

c² = 12² + 16²

c² = 144 + 256

c² = 400

c = 20 in.

Thank yooo