You can put this solution on YOUR website!
An equilateral triangle means all the sides have the same length. So if the perimeter is 9 you would divide it by 3 to get each sides length.
A of a triangle=(1/2)base*height
To find the height you would cut the triangle in half down the middle to get 2 right triangles. You will need to solve one of them to get the Vertical side.
we are looking for a so we need to rearrange the problem to get
c is the side of your triangle equal to 3. b is the 1/2 of the other side of your triangle so (3/2) Plug into the formula and solve for a.
, take the square root of both sides to solve for a
SO to find area