If each interior angle is doubled of each exterior angle of a regular polygon with n sides, then the value of n is 

If angle bisector of a triangle bisects the opposite side, then what type of triangle is it?

Given that DE || BC, AD : DB = 3 : 4, find out ar(∆ADE)/ar(∆ABC)?

Find out the equation of line which is perpendicular to 2x - 3y = 5 and passes through point (1,1).

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

In triangle ABC, F is the centroid. If AB=11 cm, BC=14 cm and AC=7 cm, then what is the value (in cm) of EF?

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

Each internal angle of regular polygon is two times its external angle. Then the number of sides of the polygon is: