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Geometry Proofs in Videos



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Video lessons to help geometry students learn the following proofs: Triangle Medians and Centroids (2D Proof)
Area Circumradius Formula Proof
Proof that the diagonals of a rhombus are perpendicular bisectors of each other.
Two column proof showing segments are perpendicular.

Triangle Medians and Centroids (2D Proof)
Showing that the centroid is 2/3 of the way along a median
Area Circumradius Formula Proof
Proof of the formula relating the area of a triangle to its circumradius



Rhombus Diagonals
Proof that the diagonals of a rhombus are perpendicular bisectors of each other
Two column proof showing segments are perpendicular
Using triangle congruency postulates to show that two intersecting segments are perpendicular


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