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## High school geometry

### Course: High school geometry > Unit 4

Lesson 6: Proving relationships using similarity- Pythagorean theorem proof using similarity
- Exploring medial triangles
- Proof: Parallel lines divide triangle sides proportionally
- Prove theorems using similarity
- Proving slope is constant using similarity
- Proof: parallel lines have the same slope
- Proof: perpendicular lines have opposite reciprocal slopes

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# Prove theorems using similarity

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