19. If $\theta = 20^{\circ}$ subtends an arc on a circle of radius 5 ft, then the length of the arc is (a) 100 ft (b) 4 ft (c) 0.25 ft (d) 1.75 ft (e) 5729.58 ft
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The formula for the circumference of a circle is C = 2πr, where C is the circumference and r is the radius. Given that the radius is 5 ft, we can substitute this value into the formula to find the circumference: C = 2π(5) = 10π ft Show more…
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