Which number will replace the question mark (?) in the

Find area of a sector of radius 14 cm with central angle 90°. (π = 22/7)

ABCD is a cyclic quadrilateral, such that ratio of measures ∠A, ∠B and ∠C is 1 : 4 : 5, then the measure of ∠D is?

What will be inradius of a right angle triangle whose base is 13 cm & height is 84 cm ?

The 2^nd approximation to a root of the equation x2-x-1-0 in the interval (1, 2) by Bisection method will be:

A triangle has sides 13 cm, 14 cm and 15 cm. Find the radius of its circumcircle.

The length of the each side of an equilateral triangle is 21√3. The area of incircle, (cm ² ) is

Let two chords AB and AC of the larger circle touch the smaller circle having same centre at X and Y. Then XY = ?