Congruent triangles - Why SSA does not work
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Math Open Reference
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Congruent triangles - Two sides and included angle. SAS
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Math Open Reference
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Polygons are congruent when all corresponding sides and interior angles are congruent.
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Math Open Reference
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Definition and properties of the inscribed angle of a circle
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Math Open Reference
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Definition and properties of vertical (or opposite) angles
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Math Open Reference
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Definition and properties of supplementary angles - two angles that add to 180 degrees
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Math Open Reference
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Definition and properties of the interior angles of a transversal
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Math Open Reference
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Definition and properties of the exterior angles of a transversal
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Math Open Reference
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Definition of a straight angle. An angle that exactly 180 degrees - a straight line.
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Math Open Reference
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Definition of an right angle (one whose measure is exactly 90 degrees).
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Math Open Reference
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