this is soo frusterating.. the computer doesnt let me get past this assignment. help please. Find the area of an equilateral triangle (regular 3-gon) with the given measurement.
9-inch perimeter
A = _______ sq. in.

Question

this is soo frusterating.. the computer doesnt let me get past this assignment. help please. Find the area of an equilateral triangle (regular 3-gon) with the given	measurement.
9-inch perimeter
A = _______ sq. in.

anonymous · Answer

$$s^2\frac{\text{Sqrt}[3]}{4}$$

anonymous · Answer

This will find you area of equilateral triangle, remember each side is 3

anonymous · Answer

so then i would end up with 2 and 1/4?

anonymous · Answer

$$\frac{9 \sqrt{3}}{4}$$

anonymous · Answer

Your s = 3, so 3 * 3 * Sqrt(3) all over 4 is your area.

anonymous · Answer

P=9 inches
than each side = 3 inches
  A=(b*h)/2
3/2=1.5
h= 1.5tan60
h=2.5980
A=(3*2.6)/2
A=3.897114317
you round

anonymous · Answer

Don't worry. She will be back soon, saying, Computer won't accept my answer.

anonymous · Answer

Most homework website demand exact answer

anonymous · Answer

Actually, many demand, rounding off to a certain decimal point.

anonymous · Answer

thanks everyone . but the computer is lame and tells me im wrong. and that its incorrectD: chaguanas is right computers want exact answers :(

anonymous · Answer

Check out instructions, it might say round off to so many digits or something like that.