Equilateral and isosceles example problems | Congruence | Geometry | Khan Academy
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Three example problems involving isosceles and equilateral triangles. 2 from Art of Problem Solving (by Richard Rusczyk) book
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https://www.khanacademy.org/math/geometry/congruent-triangles/isoscleles_equil/e/recognizing-triangles?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Watch the next lesson: https://www.khanacademy.org/math/geometry/congruent-triangles/isoscleles_equil/v/another-isosceles-example-problem?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
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https://www.khanacademy.org/math/geometry/congruent-triangles/isoscleles_equil/v/equilateral-triangle-sides-and-angles-congruent?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
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