Khan Academy | Similar triangles & slope: proportion of segments | Grade 8 (TX) | Khan Academy @khanacademy | Uploaded August 2024 | Updated October 2024, 6 days ago.
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khanacademy.org/math/grade-8-math-tx/x42e41b058fcf4059:untitled-76/x42e41b058fcf4059:similar-triangles-slope/v/similar-triangles-and-slope-proportion-of-segments

Students use similar triangles to show that the slope is the same between any two points on a line in the coordinate plane. This worked example shows how to write the proportion with the letters for the sides.

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