Prove that the sum of the squares of the sides of a rhombus is equal to the sum of the squares of its diagonals.

Prove that the area of a rhombus is equal to half of the product of the diagonals.

In a paralledogram, the sum of the square of the lengths of the diagonals is equal to sum of the squares of the lengths of its sides.

If the sum of the squares of the sides of a triangles ABC is equal to twice the square of its circum diameter , then sin ^(2) A + sin ^(2) B + sin ^(2) C =

If the sum of the squares of the sides of a triangle ABC is equal to twice the square of its circum diameter, then sin^2A+sin^2B+sin^2C =

The sun of the squares of the sides of a triangle is 32 then the sum of the squares of the medians of the triangle is

IF the sum of the roots of ax^2+bx+c=0 is equal to the sum of the squares of the roots, then……..

IF twice the square of the radius of a circle is equal to half the sum of the squares of the sides of inscribed triangle ABC, then sin^2 A+sin^2 B+sin^2 C=

If the sum of the roots of x^(2) + bx + 1 = 0 , is equal to the sum of their squares, then b =

Prove that three times the square of any side of an equilateral Triangle is equal to four times the square of the altitude.