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

Each interior angle of a regular polygon is 144⁰. The number of sides of the polygon is 

A field in the shape of a trapezium whose parallel sides are 200 meter and 400-meter-long, whereas each of other two sides is 260 meter long. What is the area (in m²) of the field?

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

The exterior angle of a regular polygon is one-third of its interior angle, the number of sides of the polygon is -

In a ∆ABC ∠A : ∠B : ∠C  = 2 : 3 : 4 . A line CD drawn || to AB, then the ∠ACD is: 

In ∆ABC, AC = BC and ∠BAC = 40°. If BC is extended to D such that BC = CD, find out ∠ADC = ?

Find the value of ∠OBE=?