Question

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

Answer 1

Come on aroub you can do it!

Answer 2

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

Answer 3

one side = 2*7 = 14
perimeter = 42

Answer 4

What's the perimeter?

Answer 5

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

Answer 6

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

Answer 7

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

Answer 8

I mean the formula!

Answer 9

P= PQ+QR+PR

?

Answer 10

yes, that would be perimeter around the triangle

Answer 11

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