In a circle having radius r, an arc of a circle subtends an angle of measure ø at the
centre, then find the length of arc
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Answer:
Circumference of a circle of radius r is equal to 2πr
Angle subtended by circumference at the center in radians is 360
o
Hence, length of arc subtending an angle θ
o
is: l=
360
θ
×2πr
l=
180
πθr
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