Prove that the area of the equilateral triangle described on the side of a square is half the area of the equilateral triangles described on its diagonal.

Prove that the area of the square drawn on the diagonal of a square is twice the area of the given square.

Prove that if equilateral triangles are drawn on the sides of a right-angled triangles then the area of the equilateral triangle, drawn on the hypotenuse is equal to the sum of the areas of the other two equilateral triangals drawn on its other two sides.

The area of equilateral triangle is 25 sq-cm Find its perimeter.

Draw the incircle of an equilateral triangle of side 7 cm.

Find the ratio of the area of the equilateral triangle and that of its circumcircle

An equilateral triangle of side 6 cm. Its area is :

If the equilateral triangle DeltaAOB be into the square ABCD. Find angleCOD

Construct an equilateral triangle with side 7 cm.

Draw a equilateral triangle with length of side 6 cm .

Prove that the sum of the areas of the squares drawn on the sides of a rhombus is equal to the sum of the areas of two squares drawn on the diagonals of the given square.