Geometry USA: Recent Episodes
Geometry USA
A tutorial on Supplements of Congruent Angles are Congruent by GeometryUSA.
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A tutorial on how to use angle angle side in a proof.
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An if sides then angles proof with a tutorial.
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A tutorial on how to use CPCTC in a proof!
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An explanation of how to prove the angles of an equiangular triangle are all sixty degrees using the division property.