How to Figure Square Foot of a Triangle

You can find the square footage of a triangle by following a simple formula.

The square footage of a triangle is the amount of space in terms of feet that is contained within the perimeter of a triangle. Another way of stating this concept is the "area" of the triangle. You may be required to find the area of a triangle in a middle or high school math class, or even in a college math class. You also may need to be able to perform this calculation if you are measuring a space in preparation for building, remodeling or design.

Things You'll Need

• Tape measure
• Calculator

Instructions

1. Measure the base -- or bottom leg -- of the triangle.

2. Measure the height of the triangle. This is the distance from the base to the top point.

3. Multiply the base times the height. For instance, if the base is 4 feet long and the height is 5 feet, multiply four times five to get 20.

4. Divide your answer from step three by two to get the square footage. In this example, you would divide 20 by two to get a square footage of 10.

References

• Math Goodies: Area of a Triangle