Congruent legs and base angles of isosceles triangles
Khan Academy
515
09:02
Equilateral triangle sides and angles congruent
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458
06:28
Example involving an isosceles triangle and parallel lines
Khan Academy
532
03:15
Figuring out all the angles for congruent triangles example
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547
04:34
Fill-in-the-blank triangle proofs example 1
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531
09:41
Fill-in-the-blank triangle proofs example 2
Khan Academy
523
06:38
Wrong statements in triangle proofs example 1
Khan Academy
543
02:47
Problem involving angle derived from square and circle
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467
08:14