This unit is about the properties of angles in 2-dimensional shapes (polygons).
7.1 Angle Relationships in Triangles
Video - Exterior Angles of Triangles
Video - Interior and Exterior Angles of Triangles
7.2 Angle Relationships in Quadrilaterals
Video - Angles in a Quadrilateral
7.3 Angle Relationships in Polygons
Video - Exterior Angles of Polygons
Video - Sum of Interior Angles of Polygons
7.4 Midpoints and Medians in Triangles
Video - Median of a Triangle
7.5 Midpoints and Diagonals in Quadrilaterals
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