\(a=\sqrt{32^2+45^2-2\cdot32\cdot45\cdot cos60^o}\approx40,11\)
\(m_a=\dfrac{\sqrt{2\left(32^2+45^2\right)-40,11^2}}{2}\approx33,5\)
\(m_b=\dfrac{\sqrt{2\left(40,11^2+45^2\right)-32^2}}{2}\approx39,5\)
\(m_c=\dfrac{\sqrt{2\left(40,11^2+32^2\right)-45^2}}{2}\approx28,5\)
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