The largest and the smallest angles of a triangle are in the ratio of 3:1 respectively. The second largest angle of the triangle is equal to 56°. What is the value of largest angle of the triangle?

A solid sphere of diameter 7 cm is cut into two equal halves. What will be the increase (in cm.²) in the total surface area?

In the triangle ABC, AB = 2 cm, BC = 3 cm and AC = 4 cm. D is the middle point of AC. If a square is constructed on the side BC, what is the area of the square?

PT is a tangent at the point R on a circle with centre O. SQ is a diameter, which when produced meets the tangent PT at P. If ∠SPT=32°, then what will be the measure of ∠QRP?

A unique circle can always be drawn through x number of given non-collinear points, then X must be 

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

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

The difference between the interior and the exterior angles of a regular polygon is 150^o. Find the number of sides in the polygon.