How do you find the area dn circumference of a circle?
Please help
Thank you.
Finding area and circumference of a circle?
2008-05-17 12:12 pm
回答 (12)
2008-05-17 12:17 pm
✔ 最佳答案
The circumference of a circle is the distance around the outside of the circle. It could be called the perimeter of the circle. How to find the circumference of a circle:
The circumference of a circle can be found by multiplying pi ¶ (which is equal to 3.14) by the diameter of the circle.
If a circle has a diameter of 4, its circumference is 3.14*4=12.56
If you know the radius, the diameter is twice as large.
2008-05-17 12:20 pm
Area = pi x radius^2
Circumference = 2pi x radius or pi x diameter
Circumference = 2pi x radius or pi x diameter
2016-04-06 5:20 pm
area= pi * radius squared so, you should have a pi button on your calculator take pi times your radius squared. your radius is 4, half of 8 and 4 squared or 4*4=16. your answer is 16*pi. circumference= 2*radius*pi your radius is 4, half of 8. 2*4=8. finish out the formuala 8*pi is your answer.
2008-05-17 1:32 pm
1)
a = πr^2
(area = pi * radius * radius)
2)
c = 2πr
(circumference = 2 * pi * radius)
a = πr^2
(area = pi * radius * radius)
2)
c = 2πr
(circumference = 2 * pi * radius)
2008-05-17 12:36 pm
Pi r squared
2 Pi r
2 Pi r
2008-05-17 12:32 pm
Area- (3.14)(Radius)(Radius)
Cir- 3.14(diameter) OR 3.14(2)(Radius
3.14- Pi which also can be 3.142 and 22/7
Cir- 3.14(diameter) OR 3.14(2)(Radius
3.14- Pi which also can be 3.142 and 22/7
2008-05-17 12:27 pm
area of a circle=#*r*r,where # is pie=3.14 and r is the radius of the circle.
circumference of a circle = 2*#*r,where # is pie = 3.14 and r is the radius of the circle.
good luck
circumference of a circle = 2*#*r,where # is pie = 3.14 and r is the radius of the circle.
good luck
2008-05-17 12:24 pm
OMG I JUST DID THIS IN MATHS
to figure out the area: pi r squared
and circumferance: 2 pi r
r = radius
to figure out the area: pi r squared
and circumferance: 2 pi r
r = radius
2008-05-17 12:19 pm
Area of a circle(A) is given by:
A = pi*r^2 where r is the radius of the circle and pi ~ 3.142
Circumference (C) of a circle is:
C = 2*pi*r or pi*d where d is the diameter of the circle (=2*r)
Note 3.142 is an ~ value for the constant pi. Use whatever fig. you have been given or the pi button on your calculator.
A = pi*r^2 where r is the radius of the circle and pi ~ 3.142
Circumference (C) of a circle is:
C = 2*pi*r or pi*d where d is the diameter of the circle (=2*r)
Note 3.142 is an ~ value for the constant pi. Use whatever fig. you have been given or the pi button on your calculator.
2008-05-17 12:16 pm
Area PIE R SQUARED and Circumference is 2 PIE R
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