What is the arc length made by an angle of (72^\circ) in a circle of radius (20) cm?
Advertisement
Answer and explanation
Correct answer: (8\pi) cm
(72^\circ=\frac{2\pi}{5}) and (s=20\times \frac{2\pi}{5}=8\pi) cm. Convert degrees to radians before finding the arc.
Frequently asked questions
What is the correct answer to this question?
(8\pi) cm
Why is this the correct answer?
(72^\circ=\frac{2\pi}{5}) and (s=20\times \frac{2\pi}{5}=8\pi) cm. Convert degrees to radians before finding the arc.
Which subject and chapter does this question cover?
This is a Class 12 Mathematics question. Chapter: Trigonometric Functions. Topic: Angles.
Advertisement