trig multiple choice!
a student contructs an arc length of a circle by rotating a radius of 10cm through an angle of 120º. the length of the arc subtended by the angle is approx
a)21cm
b)1200cm
c) 10cm
d)210cm

Question

anonymous · Answer

well u know the circumference of the circle is the radius times 2 times pi which in this case is 20pi. and 120 degrees is 1/3 of the full circle which means the arc length is 1/3 of 20pi in cm so plug it into the calculator but i assume it is answer a