TACHS Math : Perimeter of triangles, squares, and rectangles

Study concepts, example questions & explanations for TACHS Math

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Example Questions

Example Question #1 : Perimeter Of Triangles, Squares, And Rectangles

Find the perimeter of a square with the following side length:

\(\displaystyle s=5\)

Possible Answers:

\(\displaystyle 10\)

\(\displaystyle 25\)

\(\displaystyle 625\)

\(\displaystyle 20\)

\(\displaystyle 5\)

Correct answer:

\(\displaystyle 20\)

Explanation:

Perimeters can be calculated by adding together the side lengths of a polygon. A square has four sides that are all the same length, therefore, we can write the following formula to solve for the perimeter.

\(\displaystyle P=s+s+s+s\)

We can rewrite this equation as the following:

\(\displaystyle P=4s\)

In these equations the variable, \(\displaystyle s\), represents side length.

Substitute the known side length and solve.

\(\displaystyle P=4\times5\)

\(\displaystyle P=20\)

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