## Geometry Tutorial

#### Intro

In this tutorial, we’re going to look at a real world solution for finding a missing base or height when given the area of a triangle and either a given base or height.

#### Sample Problem

Problem 1: Tony wants to make decorative napkins for a plate setting at a wedding. The area of the napkins must be 16 square inches in order for there to be room on the table for other dishes, glasses, etc. If the height of a napkin, when folded into a triangle, is 4 inches, what must the length of the base be in order for the area of the triangle to be 16 square inches?

#### Solution

This is what the triangle in this problem looks like: Recall that the formula for the area of a triangle is
A=(1/2)x(b)x(h)

1. The given measurements are 4 inches for the base and 16 inches for the area. All you have to do is plug the numbers into the formula. The base of the triangle-shaped napkin must be 8 inches long. That’s a rather large napkin, right?

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