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

2π/9 radians = _________.

23^o 20^o = _________ radians.

An arc 15 feet long describes an angle of 5 radians at the centre of a circle.Then the radius of the circles is

(2 4/5)^o = ______^o _______'

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

80^o 33' 20'' = ____________.

Express in radians, the measure of the internal angles of a pentagon

If π = 22/7 then the approximate value of 1 radian is

A wheel whose radius is 15 inches is turning at a speed of 300 revolutions per minute.Find the speed in miles per hour of a point on the wheel?