In a triangle ABC, A = 90° and D is the mid point of AC. The value of BC2 - BD2 is equal to
In the figure shown, square 2 is formed by joining the mid-points of square 1, square 3 is formed by joining the mid-points of square 2 and so on. In this way total five squares are drawn. The side of the square 1 is 'a' cm. What is the sum of perimeters of all the five squares?
D None of these
Which of the following options is CORRECT?
ATwo rational numbers with different denominators can never be equal.
BThe rational number lies on the right of 0 on the number line.
CDifference of two rational numbers is always a rational number.
DThe standard form of