Find the radian measure of the central angle of circle with radius 1 yards that intercepts an arc of length 4 yards.

The circumference of the circle is given by pi diameter so we have pi*2 for 1 circumference. the portion of 2*pi circumference for the whole circle for this arc is (4/2*pi).

The total angular measure of the circle is also 2*pi (or 360 degree)

So, we the measure radian of the angle is ((4 / (2*pi)) * (2*pi)

= 4 radians