A circular sheet of paper is divided into two sectors. Central angle of one of them is `160^@`.
What is the central angle of the remaining sector?

If the pair of lines ax^2 +2 (a + b) xy + by^2 =0 lie along diameters of a circle and divide the circle into four sectors such that the area of one of the sectors is thrice the area of another sectors, then:

What is the area of the sector with central angle 120^@ ?

The area of a sector is one twentieth of the area of the circle. Find the sector angle.

The area of a sector of a circle 1/20 the area of the circle Find the sector angle.

The resultant of two vectors of equal magnitude is equal to the magnitude of either of the two vectors. What is the angle between the two vectors ?

A wire of length 10 cm is bent so as to form an arc of a circle of radius 4 cm. What is the angle at the centre in circular measure?