An angle is four times its complementary angle. What is the measure of the angle?

If AD, BE and CF are medians of ∆ABC, then which one of the following statements is correct? 

In the figure below, find the value of AB.

ABCD is square and CDE is an equilateral triangle outside the square . What is the value ( in degrees ) of ∠BEC ? 

Two circles having radii 5 units intersect each other in such a way that each of them passes through the centre of the other. Then the length of their common chord is

What is the length of the radius of the circumcircle of the equilateral triangle, the length of whose side is 6√3 cm?

O is the incentre of ∆ABC and ∠A = 30° then ∠BOC is

In ∆ABC, ∠B is a right angle, AC = 6cm, and D is the mid-point of AC. The length of BD is: