In these lesson, we will learn
The following diagram shows that the sum of angles in a triangle is 180°. Scroll down the page for more examples and solutions on how to find missing angles in a triangle.
The interior angles of a triangle are the angles inside the triangle.
Find the value of x in the following triangle.
x + 24° + 32° = 180° (sum of angles is 180°)
x + 56° = 180°
x = 180° – 56° = 124°
How to find the missing angle inside a triangle.
Find the missing angle in a triangle.
A = 15°, B = ?, C = 92°
How to use the sum of the interior angles of a triangle to solve problems?
Using the sum of the interior angles of a triangle, write an equation and solve for the unknown.
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