In a circle of diameter 40cm the length of a chord is 20 cm. The length of the minor arc of the chord is

In which quadrant 45^o lies ?

The radian measure of 25^o is

A train is travelling on a curve of 500 mt radius at the rate of 66 k ph. Through what angle will it turn in 20 seconds ?

The length of an arc of a circle of radius 10 cm  which subtends an angle of 45^o at the centre is

If the arc of the same length in two circles subtend angles 75^o and 120^o at the centre, then the ratio of their radii is

The angle in radian through which a pendulum swings and its length is 75 cm and the tip describes an arc of length 21 cm is

Find in radians the angle of a regular octagon.

The degree measure of ^5π/₃  is

The radian measure of 240^o is