Congruence
Theorems concerning triangle properties
Explore triangle theorems by investigating angles and side relationships, boosting geometric reasoning, and applying these principles to build and analyze congruent figures in dynamic, engaging ways.
200+ videos and assessments
Standards aligned
Vetted by experts
VIDEOS
Angles in a triangle sum to 180° proof
Khan Academy
•6th - 10th Grade
•10 Qs
Proofs concerning equilateral triangles
Khan Academy
•6th - 9th Grade
•10 Qs
Proofs concerning isosceles triangles
Khan Academy
•7th - 10th Grade
•10 Qs
Triangle exterior angle example
Khan Academy
•7th - 10th Grade
•10 Qs
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