in a circle of radius 21 cm an arc subtends an angle of 270 degrees at the centre find the length of the arc??
plz answer fast
Answers
Answered by
1
r = 21 cm
ø = 270
length of arc = ø/ 360 x π r ^2
= 270/ 360 x 22/7 x 21 x21
= 2079/2
= 1038.5
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Answered by
1
Answer:
99 cm is the right answer.
Step-by-step explanation:
=270°/360°×(2πr)
=270°/360°×2(22/7)21
by solving above numerical
=99cm
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