Workkeys Math Practice Test 2026 - Free Math Practice Questions and Study Guide

Question: 1 / 400

What is the sum of the angles in a triangle?

90 degrees

180 degrees

The sum of the angles in a triangle is always 180 degrees. This is a fundamental property of triangles in Euclidean geometry, which applies regardless of the type of triangle (whether it is scalene, isosceles, or equilateral). When you add the measures of the three interior angles of any triangle, they will always total 180 degrees.

This property can be observed by drawing a triangle and extending one of its sides, allowing you to use parallel lines and alternate interior angles to visualize that the angles formed together equal 180 degrees. Understanding this concept is crucial for solving many problems in geometry, as it often serves as the basis for other calculations involving triangles, such as finding missing angles or understanding relationships between angles in more complex shapes.

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360 degrees

120 degrees

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