Area = 1/2*base*perpendicular height.
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Area = 0.5*base*altitude
A triangle is the same as a equilateral triangle because a equilateral triangle is a triangle but it is congruent on all sides
Area of an equlateral triangle = 0.5*side2*sin(60)
Area = side^2 x (√3)/4
Area = 15.58846 cm2