Question

the area of an equilateral triangle is given by the expression s^2 x square root of 3/4, where s is the side length of the triangle. what is the area of the triangle? round to the nearest tenth

the triangle is 5 cm on all three sides.
(1/4)(25)sqrt 3 = 10.8 cm^2
A = 0.5*AB*AC*sin A=0.5 *5 * 5 * sin 60 = 10.8 cm^2.

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