find the perimeter of if radius is 21 metre of circle
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Answers
Answered by
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Step-by-step explanation:
Radius of a circle, r = 21 cm
Perimeter of a quadrant, P=( 2π+2)r units=( 7×222+2)×21=( 1422+2)×21
P=( 1422+28 )×21=
1450×21
=75cm.
Wrong
It’s C≈131.95
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See the second answer that's correct
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Answered by
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Answer:
Answer is here :-
Step-by-step explanation:
Circumference = 2πr
= 2×22/7×21
= 2×22
= 44
Ans. 44
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Similar questions
as we know that
Perimeter of semi circle with radius r is πrand area of semi circle is 4πr2
So perimeter of semi-circular plot is π(21)=722×21=66 m
Area of semi-circular plot is 4π(21)2=7×422×21×21=346.5 m2