If the equation of the base of an equilateral triangle is `x + y = 2` and he vertex is (2,-1) find the length of each side of the triangle.

Equation of the base of an equilateral triangle is 3x + 4y = 9 and its vertex is at point (1,2) .Find the equations of the other sides and the length of each side of the triangle .

Find the area of an equilateral triangle of sides8 dm each.

The side of an equilateral triangle is 3.5 cm. Find its perimeter.

An equilateral triangle of side 9 cm.

Find the area of an equilateral triangle whose each side is 4 cm.