If the area of a square is equal to the area of an equilateral triangle, the ratio of the side of the square and the side of the equilateral triangle is

The sides of an equilateral triangle are (2a – b) cm, (a + 3b) cm and (2a – 2b + 1) cm then the perimeter of the triangle is

X, Y and Z are three equilateral triangles. The sum of the areas of X and Y is equal to the area of Z. If the side lengths of X and Y are 6 cm and 8 cm respectively, then what is the side length of Z?

The area of a circle is 40π² . The area of a square with sides equal to radius of the circle is

The sides of a triangle are 5 cm, 12 cm and 13 cm. then its area is

If the sides of a triangle are doubled, then its area