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  • Evidently, <math>MM'Q</math> is an equilateral triangle, so triangles <math>MRM'</math> and <math>ABC</math> are congruent. Also, triangles <math>PMQ</mat <cmath> [ABC] + \frac{b^2 \sqrt{3}}{4} = [MRM'] + [MM'Q] = [QMR] + [RM'Q] = [QMR] + [PMQ] . </cmath>
    7 KB (1,221 words) - 18:57, 3 July 2013