first time doing common core math and it has me crying, can anyone please help? what is the length of a side of an equilateral triangle whose altitude has a length of 18?

Question

first time doing common core math and it has me crying, can anyone please help? what is  the length of a side of an equilateral triangle whose altitude has a length of 18?

anonymous · Answer

By altitude you mean its height?

misty1212 · Answer

HI!!
there is no crying in math (common core is criminal, but no crying)
this takes exactly two steps

anonymous · Answer

I don't know what an altitude is, I am just coming back into school in  the middle of the math year

misty1212 · Answer

yeah usually the formula is given for the altitude of you know the side
if you know the side the altitude $h$ is 
$$h=\frac{\sqrt3}{2}S$$for side $S$

misty1212 · Answer

to go backwards, if the altitude is $h$ then the sides is 
$$S=\frac{2}{\sqrt3}h$$

anonymous · Answer

that is still confising. forget it, ill never get it

misty1212 · Answer

it is not something to "get"
you just write it

misty1212 · Answer

$$S=\frac{2}{\sqrt3}\times 18$$ done

misty1212 · Answer

or perhaps once you write that 
$$S=\frac{36}{\sqrt3}$$