# WP2-Solve Triange if you know perimeter

Taught by YourMathGal
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Lesson Summary:

In this lesson, students are taught to solve for the sides of a triangle by finding the perimeter. They begin with a picture of a triangle and the perimeter of 85 meters. Using an equation and factoring, students work to solve for the lengths of the sides of the triangle. Through this process, they learn the importance of conventional math rules and how to factor quadratic equations.

Lesson Description:

This is a Word Problem you solve by writing an equation and factoring. Word Problem 2 - Perimeter of a Triangle-The perimeter of a given triangle is 85 meters. By looking at the picture, state the lengths of the sides of the triangle.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

Questions answered by this video:
• If the perimeter of a triangle is 85 meters, and the side lengths are 2x, 2x + 5, and x^2 + 3, how do you find the lengths of the sides of the triangle?
• How can you solve a word problem that asks for the lengths of sides of a triangle?
• What are the steps for solving a word problem in math?
• How do you solve a word problem by writing an equation and factoring?
• How do you know when an answer does not make sense in a word problem?
• How do you know when a quadratic equation for a word problem has no solution?
• #### Staff Review

• Currently 4.0/5 Stars.
This video explains how to write and solve a quadratic equation for the perimeter of a triangle when each side is a variable expression. This is a great tutorial for learning how to tackle and solve word problems in math.