SSAT Upper Level Math : Equilateral Triangles

Study concepts, example questions & explanations for SSAT Upper Level Math

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Example Questions

Example Question #531 : Geometry

What is the perimeter of an equilateral triangle with a side of \displaystyle 9?

Possible Answers:

\displaystyle 9\sqrt3

\displaystyle 27\sqrt3

\displaystyle 27

\displaystyle 13.5

\displaystyle 3\sqrt3

Correct answer:

\displaystyle 27

Explanation:

An equilateral triangle has three equal sides.  Since the side length is 9, multiply the side length by three to get the perimeter.

\displaystyle P=3s=3(9)=27

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