Instructional Video

Khan Academy: Geometry: Congruent Parts of Iscosceles Triangles

Curated by ACT

Proof that if the legs of an isosceles triangle are congruent then the base angles are congruent and vice versa using triangle congruency postulates. The proof is written as a two-column proof. [9:03]

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CCSS: Adaptable
Concepts
corresponding angles, corresponding sides, congruent triangles
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Additional Tags
angle-angle-side postulate, application of triangle congruency, side-side-side postulate, aas postulate, khan academy, khan academy math, sss postulate, isosceles triangle, two-column proof
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Resource Details
Grade
9th - 10th
Subjects
Math
2 more...
Resource Type
Instructional Videos
Audiences
For Administrator Use
2 more...
Lexile Measures
0L