Find the length of a tangent, drawn to a circle of radius 4 cm, from a point which is at a distance of 5 cm from the centre?

If two complementary angles are in the ratio of 2:3. find the ratio of square of smaller angle to square of greater?

If the angles of a triangle are in the ratio of 2:3:7, then find the ratio of the greatest angle to the smallest angle.

If the sum of the interior angles of a regular polygon be 1080 °, the number of sides of the polygon is 

The number of sides in two regular polygons are in the ratio of 5 : 4. The difference between their Interior angles of the polygon is 6⁰ . Then the number of sides are 

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

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

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