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

2

Find the degree measures corresponding to the following radian measures (use π=).(i) (ii)-4 (iii) (iv)

3

A wheel makes 360 revolutions in one minute. Through how many radians does it turn is one second?

5

If, in two circles, arcs of the same length subtend angles of 60^o and 75^o at the centre, find the ratio of their radii.

6

Find the angle in radian through which a pendulum swings if its length is 75cm and the tip described an arcs of length
(i) 10cm
(ii) 15cm
(iii) 21cm