if an equillateral triangke has the perimeter of 66, what is the altitude? i just wanna know how to solve it, like the formula.

Question

hero · Answer

Well, if given the perimeter of an equilateral triangle, you can find the lengths of the sides by using the formula

$$S_{\text{Triangle}} = \frac{P}{3}$$

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Afterwards, you'll have to draw the altitude which divides the base of the triangle in half. 
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Furthermore, you'd have to use Pythagorean Theorem to find the the length of the altitude

anonymous · Answer

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so, how would i make this into a pythagoream theorom?

hero · Answer

Split the bigger triangle into two smaller ones. Then just solve for one of the missing sides. The missing side is the altitude of course.

hero · Answer

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a^2 + b^2   = c^2
a^2 + 11^2 = 22^2

anonymous · Answer

i got a=24.6  .. is that right?