College Math Placement Practice Test 2026 - Free College Math Questions and Study Guide

An equilateral triangle is defined as a triangle where all three sides are of equal length, and consequently, all three angles are also equal. Since the sum of the angles in any triangle is always 180 degrees, an equilateral triangle must have each of its angles equal to one third of the total angle measure.

To find the measure of each angle in an equilateral triangle, you can use the formula:

\[

\text{Measure of each angle} = \frac{\text{Total angle measure}}{\text{Number of angles}} = \frac{180°}{3} = 60°

\]

Thus, each angle in an equilateral triangle measures 60 degrees. This result is consistent with the properties of equilateral triangles, confirming that they possess not only equal sides but also equal angles, specifically at 60 degrees each.