10. Find the length of the arc on a circle of radius r intercepted by a central angle 0. r=20 cm, e 1/4 radian
Mathematics · High School · Tue Nov 03 2020
llm
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Given:
radius = 20 cm
angle = ¼ radians
Formula for the arc length of a circle:
s = 2 π r (θ/360°) or s = r θ
Since the given is in radians, then the formula: s = r θ will be used
Solution:
s = (¼)(20cm)
s = 5 cm
The arc length of the circle is 5 cm.