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Khan Academy (English - US curriculum)
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Khan Academy (English - US curriculum)
Math by grade
Illustrative Mathematics
8th grade (Illustrative Mathematics)
Unit 1: Rigid transformations and congruence
Lesson 12: Congruent polygons
Lesson 12: Congruent polygons
Congruent shapes & transformations
Non-congruent shapes & transformations
Congruence & transformations
