The 3 interior angles of any triangle add up to 180 degrees
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A three-sided polygon is a triangle. The angles in a triangle add up to 180 degrees.
A 3-sided polygon is called a "triangle".The angles of a triangle don't equal 180 degrees.They total 180 degrees when they're added.
In Geometry that are many different types of polygons. The polygon whose angles equal up to 180 degrees is a triangle.
The total for the interior angles depends on the number of sides. The formula for the total of interior angles of an n-sided polygon is sum =180(n-2). This is 180 degrees for triangles, 360 degrees for quadrilaterals, and 540 degrees for pentagons.
The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees. 1980 degrees.