#1.)1/2ft. ( radius )
#2.) 3cm (diameter)
#3. 11inc. (radius)
2006-09-19 21:30:00 · 6 answers · asked by crazybrunette1991 2 in Education & Reference ➔ Homework Help
I don't know why I am helping you with your HW, but I am feeling nice. Im gonna tell you how to do it too so you are good to go for next time.
Diameter = 2 X Radius
Circumference = Pi (3.14) X Diameter
So....
1. 3.14 feet
2. 9.42 cm
3. 69.08 inches
Now you know!
2006-09-19 21:37:33 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The formula of circumference of a circle is= 2*pi*r OR pi*D
(r=radius and d=diameter)
pi has a value of 3.14 or 22/7.
1. Circumference= 2*22/7*1/2
= 22/7 feet
2. Circumference= 22/7*3
= 66/7 cm
3. Circumference= 2*22/7*11
=484/7 inches
2006-09-20 04:37:18 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You can use the equation 2 x Pi x r to calculate circumference.
Since #1 you are already given the value r, it is a straight forward substitution into the equation.
for #2, the diameter is actually 2 x r, so you can actually mutliply by Pi to get the circumference directly.
#3 the value of r is also given.
If you need to convert between the measurement systems i.e. between feet, inches and centimeters, you can always use a website that helps you to convert see below
2006-09-20 04:43:16 · answer #3 · answered by unstable 3 · 0⤊ 0⤋
Perimeter of a circle can be found by the formula
p=2. r .pi
1) p=2. 1/2 . 3,14 ft.
2) p= 3. 3,14 cm
3) p=2. 11. 3,14 inch
Do the multiplications by yourself.
2006-09-20 05:04:50 · answer #4 · answered by iyiogrenci 6 · 0⤊ 0⤋
C of circle = 2x3.14x1/2=3.14ft; (2) 2x3.14x3/2=9.42 (3) 2x3.14x11=69.08inc
2006-09-20 04:40:37 · answer #5 · answered by Anonymous · 0⤊ 0⤋
its very simple....just apply this formula
circumference=2*22/7*radius
and diameter = 2*radius so apply this formula and get ur answer....
thnx
2006-09-20 04:39:52 · answer #6 · answered by urs_amit01 3 · 0⤊ 0⤋