Triangle PQR is equilateral with altitude of length 7sqrt3. What is the perimeter of triangle PQR?

Question

anonymous · Answer

Come on aroub you can do it!

accessdenied · Answer

i think if you draw an equilateral triangle and place the altitude in, you can kind of see what' going on better...

cwrw238 · Answer

one side = 2*7 = 14
perimeter = 42

aroub · Answer

What's the perimeter?

anonymous · Answer

Actually, Altitude of an equilateral triangle is  $$ \frac{\sqrt{3}}2 \times side $$

cwrw238 · Answer

altude forms a 60-30-90 triangle  so sides are in ratio 2:1: sqrt3

cwrw238 · Answer

in this case side of equilateral triangle =  = 7*2 = 14

aroub · Answer

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I mean the formula!

aroub · Answer

P= PQ+QR+PR 

?

accessdenied · Answer

yes, that would be perimeter around the triangle

anonymous · Answer

Yes, also note that in  equilateral triangle the sides are equal.