If the equation of base of an equilateral triangle is 2x - y = 1 and the vertex is (-1, 2), then the length of the side of the triangle is

The equation of the base BC of an equilateral triangle ABC is x+y= 2 and A is (2, -1). The length of the side of the triangle is

If the equation of the base opposite to the vertex (2,3) of a equilateral triangle is x+y=2, then the length of a side is

One vertex of an equilateral triangle is (2,2) and its centroid is (-2/sqrt3,2/sqrt3) then length of its side is

The equation of the circumcircle of an equilateral triangle is x^2+y^2+2gx+2fy+c=0 and one vertex of the triangle in (1, 1). The equation of the incircle of the triangle is (a) 4(x^2+y^2)=g^2+f^2 (b) 4(x^2+y^2)=8gx+8fy=(1-g)(1+3g)+(1-f)(1+3f) (c) 4(x^2+y^2)=8gx+8fy=g^2+f^2 (d) none of these

Three charges 6muC are fixed at the three vertices of an equilateral triangle of side 9cm. Find the potential at the mid point of the base of the triangle.

The area of an equilateral triangle whose side ''a'' is . . . . . . .

Three particles each of mass m are placed at the three corners of an equilateral triangle of side a. The work done on the system to increase the sides of the triangle to 2a is: