Area of an equilateral triangleThe area of an equilateral triangle can be found by using the pythagorean formula: Start with any equilateral triangle
Label the sides
a^{2} = (a/2)^{2} + h^{2} a^{2} = a^{2}/4 + h^{2} a^{2} − a^{2}/4 = h^{2} 4a^{2}/4 − a^{2}/4 = h^{2} 3a^{2}/4 = h^{2} h = √(3a^{2}/4) h = (√(3)×a)/2 Area = (base × h)/2 base × h = (a × √(3)×a)/2 = (a^{2}× √(3))/2 Dividing by 2 is the same as multiplying the denominator by 2. Therefore, the formula is Fun math game: Destroy numbered balls by adding to 10





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