What is the area (in sq cm) of an equilateral triangle of side 13 cm?

\(\frac{169}{5}\)\(\sqrt{3}\) \(\frac{169}{4}\)\(\sqrt{3}\) \(\frac{196}{4}\)\(\sqrt{3}\) \(\frac{225}{4}\)\(\sqrt{3}\)

\(\frac{169}{4}\)\(\sqrt{3}\)

Area of equilateral triangle = \(\frac{ \sqrt{3}}{4}\)a2                  = \(\frac{ \sqrt{3}}{4}\) × 13 × 12                  = \(\frac{169}{4}\)\(\sqrt{3}\) cm2