If ABCDEF is a regular hexagon, then what is the value (in degrees) of ∠ADB? 

Two equal circles of radius 4 cm intersect each other such that each passes through the center of the other. The length of the common chord is

The Median of an isosceles triangle ΔABC is AD and ∠A = 110 °, AB = AC, find the value of ∠ADB.

Two medians AD and BE of ∆ABC intersect G at right angle. If AD = 9 cm and BE = 6 cm, then the length of BD ( in cm ) is

In ΔABC, AB = AC and ∠B = 40 °, find the value of ∠A.

The area of a circle is proportional to the square of its radius. A small circle of radius 3 cm is drawn within a larger circle of radius 5 cm. Find the ratio of the difference between the area of the larger circle and that of the smaller circle to the area of the larger circle.

In a triangle ΔABC, the sides DE parallel to BC and AD = 6 cm, DB = 9 cm, AE = 8 cm, find the value of AC.

O is the orthocentre of ΔABC. If ∠BOC=110°, ∠BAC is equal to