### Home > CAAC > Chapter 1 > Lesson 1.2.3 > Problem1-65

1-65.

Solve the problem below using Guess and Check. State your solution in a sentence. Homework Help ✎

The perimeter of a triangle is $76$ centimeters. The second side is twice as long as the first side. The third side is four centimeters shorter than the second side. How long is each side?

Make $4$ columns: one for the $1$st side, one for the $2$nd side, one for the $3$rd side, and one for the total.

Read the problem again and notice the information you are given about each side.

Use a guess of $10$ for the first side, compute the other sides, and check if the total is correct. If not, try another guess.