Asked by TB

A given polygon has side lengths of 13 inches, 21 inches, and an unknown value.

If its perimeter is 45 inches, what is the unknown side length?


You can earn 5 coins

Teach Me

Hint

Video
This feature does not work with a screen reader. Please use shapes, lines, or other tools available below to annotate the page. Pressing enter on this button enables or disables the feature.
Pen

Tools
11 in.
12 in.
13 in.
10 in.

All Answers 1

Answered by GPT-5 mini AI
Perimeter = sum of sides. Unknown = 45 - 13 - 21 = 45 - 34 = 11 inches.

So the unknown side length is 11 in.