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Equilateral Triangle Theorem (view source)
Revision as of 00:02, March 3, 2017
, 00:02, March 3, 2017→Proof
==Proof==
==Proof==
Assume a triangle ABC of equal sides AB, BC, and CA. By the ITT (Isosceles Triangle Theorem), m∠ABC = m∠BCA, m∠BCA = m∠CAB, and m∠CAB = m∠ABC.<ref>Euclid. ''The Elements''. Book I.<ref/>
Assume a triangle ABC of equal sides AB, BC, and CA. By the ITT (Isosceles Triangle Theorem), m∠ABC = m∠BCA, m∠BCA = m∠CAB, and m∠CAB = m∠ABC.<ref>Euclid. ''The Elements''. Book I.</ref>
==See also==
==See also==