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Math

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I am to find the area of an equilateral triangle whose side is 5... I know I need to find the highth before I find the area, but I end up with a hight of the square root of 31.25, is this right? if so how do I continue and solve for the area with this kind of number?

  • Math - ,

    Area = 1/2 Base * height

    With Pythagorean theorem for half of the triangle to give you the height:

    5^2 = 2.5^2 + h^2

    25 = 6.25 + h^2

    h^2 = 25 - 6.25 = 18.75

    Find square root of 18.75 and insert values into the first equation.

    I hope this helps.

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