_proof-parallel-lines-divide-triangle-sides-proportionally-124-similarity-124-geometry-124-khan-academy-preview-1.jpg "Proof: Parallel lines divide triangle sides proportionally | Similarity | Geometry | Khan Academy from side khan Video Screenshot Preview 1")
Gallery_proof-parallel-lines-divide-triangle-sides-proportionally-124-similarity-124-geometry-124-khan-academy-preview-3.jpg "Proof: Parallel lines divide triangle sides proportionally | Similarity | Geometry | Khan Academy from side khan Video Screenshot Preview 3")
Gallery_proof-parallel-lines-divide-triangle-sides-proportionally-124-similarity-124-geometry-124-khan-academy-preview-hqdefault.jpg "Proof: Parallel lines divide triangle sides proportionally | Similarity | Geometry | Khan Academy from side khan Video Screenshot Preview hqdefault")
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