This geometry video tutorial explains how to use the angle side theorem also known as the base-angle theorem in two column proofs. The angle side theorem states that if two sides of a triangle are congruent, the angles are congruent and vice versa. This theorem typically applies to an isosceles triangle. This video contains plenty of geometry practice problems that include solving equations with x and inequalities with restrictions on x.
2 Column Proofs of Congruent Segments:
https://www.youtube.com/watch?v=cboityRIf4Q
2 Column Proofs of Angles:
https://www.youtube.com/watch?v=kXcG6oYh3i8
Triangle Congruence - SSS, SAS, ASA:
https://www.youtube.com/watch?v=jWHOF6cFbpw
CPCTC - 2 Column Proofs With Triangles:
https://www.youtube.com/watch?v=eq1frp_ZyP8
Median of a Triangle Formula:
https://www.youtube.com/watch?v=_JdkDR4R8E4
Altitude of a Triangle - Orthocenter:
https://www.youtube.com/watch?v=oJyTKVcE4iM
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Triangles, Medians, & Altitudes - Proofs:
https://www.youtube.com/watch?v=ZJ_gqFidInk
2 Column Proofs - Isosceles Triangles:
https://www.youtube.com/watch?v=6Yx923Ocoh4
Hypotenuse Leg Theorem - HL Postulate:
https://www.youtube.com/watch?v=DKSTjS0n3mY
Detour Proofs - Double Triangle Congruence:
https://www.youtube.com/watch?v=1HOrB5yvEl0
Missing Diagrams - 2 Column Proofs:
https://www.youtube.com/watch?v=IaqzuGweGZ8
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