The side of a triangle are in A.P. Its area is `3/5` the of an equilateral triangle of the same perimeter. Show that the sides are in the proportion `3:5:7`.

The sides of a triangle are in A.P. and its area is 3/5t h of the an equilateral triangle of the same perimeter, prove that its sides are in the ratio 3:5:7, and find the greatest angle of the triangle.

The sides of a triangle are in A.P. and its area is (3)/(5) th of an equilateral triangle of the same perimeter. Find the greatest angle of the triangle

If the side of an equilateral triangle is 6 cm, then its perimeter is

If the side of an equilateral triangle is doubled, find the new perimeter.

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

A scarf is in the shape of an equilateral triangle. Find its perimeter if each side measures 28 cm.

Find the perimeter of an equilateral triangle with side 9cm.

Find the perimeter of an equilateral triangle of side 13 cm.

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

The area of an equilateral triangle with side 2sqrt3 cm is