1. Interior angles: The angles inside a shape or polygon. For example, in a triangle, the interior angles are the angles formed by the three sides of the triangle.
2. Triangle Angle Sum Theorem: A theorem in geometry that states the sum of the interior angles of a triangle is always equal to 180 degrees. This theorem applies to all triangles, regardless of their size or shape.
3. Vertex: The point where two line segments, rays, or lines meet to form an angle. In a polygon, the vertices are the corners of the shape where the sides intersect.
3 Vocabulary Terms - Define/Illustrate
1. Interior angles 2. Triangle Angle Sum Theorem 3. Vertex
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