The interior angles of a triangle are the three angles on the inside of a triangle, which always add up to 180°. These angles are called the bisectors and are the angles that lie in the area bounded between two parallel lines that are intersected. In a triangle, there are three interior angles at each vertex, and the sum of those interior angles is always 180°.
The interior angles of a polygon are the angles that lie inside the shape, and when two parallel lines are cut by a transversal, the angles that lie between the lines are called the interior angles. In a polygon, an interior angle is an angle that is inside the polygon.
To calculate the sum of the interior angles of a polygon, one can split it into triangles and multiply the number of triangles by 180°. This explainer will teach how to complete geometric proofs using the angle sum of a triangle and find interior and exterior angles of triangles.
In summary, the interior angles of a triangle are the three angles on the inside of the shape, which always add up to 180°. They are also known as the exterior angles, and they are used in various equations and calculations. By understanding the concept of interior angles and their importance in geometry, one can better understand the relationship between different shapes and their respective angles.
📹 Exterior Angle Theorem For Triangles, Practice Problems – Geometry
This geometry video tutorial provides a basic introduction into the exterior angle theorem for triangles. It explains how to use it …
📹 Sum of interior angles of a polygon | Angles and intersecting lines | Geometry | Khan Academy
Showing a generalized way to find the sum of the interior angles of any polygon Practice this lesson yourself on …
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