Finding congruent triangles
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488
07:27
Two column proof showing segments are perpendicular
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537
11:05
SSS to show a radius is perpendicular to a chord that it bisects
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653
08:18
Congruent triangles and SSS
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519
11:28
Acute right and obtuse angles
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535
05:31
Angle game (part 2)
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541
09:49
The angle game
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538
09:01
Angles of parallel lines 2
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542
05:14
Angles formed between transversals and parallel lines
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508
07:52
Angles (part 3)
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519
09:48
Angles (part 2)
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544
09:05
Introduction to angles (old)
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527
09:56
Sum of the exterior angles of convex polygon
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528
05:23
Proof: Corresponding angle equivalence implies parallel lines
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482
05:17
Proof: Sum of measures of angles in a triangle are 180
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557
04:27
Proof: Vertical angles are equal
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542
04:50
Vertical, adjacent and linearly paired angles
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570
04:42