Interior angles are the angles found inside a shape or polygon. When you add up all the interior angles of a triangle, the total is always 180 degrees. For other polygons, you can work out the sum of their interior angles by using the formula: (number of sides - 2) × 180 degrees. For example, a square has four sides, and its interior angles add up to 360 degrees.
Knowing about interior angles helps you understand the shapes better and solve problems in geometry.
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