In this video tutorial [11:06], the instructor shows how to construct a two-column proof using triangle congruence postulates to prove that two line segments are perpendicular.

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CCSS: Adaptable

Concepts

perpendicular lines, congruent triangles

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Additional Tags

proving lines perpendicular, triangle congruence postulates, two column proof, angle-side-angle (asa) postulate, corresponding parts of congruent triangles postulate (cpctc), khan academy, khan academy math, side-angle-side (sas) postulate, two-column proof

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Classroom Considerations

Knovation Readability Score: 3 (1 low difficulty, 5 high difficulty)

Common Core

View 7,032 other resources for 9th - 10th Grade Geometry