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how do you find the height of a triangle that is 20cm. on each side

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asked by briana
  1. So you have an equilateral triangle with sides 20 cm?

    draw in the height, it will right-bisect the base, call the height h
    Now look at the right angled triangle with sides
    h, 10, and hypotenuse 20
    h^2 + 10^2 = 20^2
    h^2 = 300
    h = √300 or 10√3

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    posted by Reiny

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