Find the length of a circle with a radius of 9 cm. What is the length of its arc with a degree measure of 20 degrees?
March 28, 2021 | education
| Circumference:
L = 2 п R;
L = 2 * 3.14 * 9 ≈ 56.52 (cm);
Arc 20 °:
360: 20 = 18 times the circumference.
Arc length:
l = 1/18 * 56.52 ≈ 3.14 (cm);
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