Ace the GED Math Test 2026 – Conquer Numbers and Unlock Your Future!

In any triangle, the sum of the interior angles is always 180 degrees. This fundamental property holds true for all types of triangles, whether they are scalene, isosceles, or equilateral. The reason behind this can be understood through geometric principles and the concept of plane geometry.

When you draw a triangle, you can extend one of its sides and drop a perpendicular line from the opposite vertex down to that side. This creates two right angles and allows you to visualize how the angles of the triangle relate to those 90-degree angles. When combined, these angle relationships reinforce that the total adds up to 180 degrees.

This important concept is essential not just in basic geometry but also in various applications across different fields, such as architecture, engineering, and more, where understanding the relationship between angles is crucial for design and structural integrity. Other numbers listed, such as 90, 270, and 360 degrees, do not represent the total angle sum of a triangle, as they pertain to different geometric figures or scenarios that do not apply to the properties of triangles.