True or False :
If the vertices of a triangle have integral coordinates, then the triangle cannot be equilateral.

State whether true or false If the angles of DeltaPQR are in the ratio 1:2:3 , then the triangle formed is a scalene triangle.

The vertices of a triangle are (3, 0), (3, 3) and (0, 3). Then the coordinates of the circumcentre are :

Prove that the coordinates of the vertices of an equilateral triangle can not all be rational.

Find the measures of the angles made by the intersecting lines at the vertices of an equilateral triangle.

Find the area of an equilateral triangle having altitude h cm.

an equilateral triangle?

The measure of each angle of an equilateral triangle is :