Forgive me my memory is about shot...all i can recall is pie=3.14
*And Diameter is the hieght and length added right?
2007-06-13 15:46:38 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
C = 2 * pi * r
or
C = d * pi
Diameter (d) is the width of a circle. (The length of the line if it were drawn through the center of the circle from arc to arc intersect)
Radius (r) is from the center of the circle to the arc. Half of the diameter.
Pi = 3.1415.....
2007-06-13 15:53:01 · answer #1 · answered by bourqueno77 4 · 0⤊ 2⤋
The diameter of a circle is the longest line which can be drawn through a circle, it passes through the center of the circle, and is twice the radius of the circle. The radius of a circle is a line drawn from the center of the circle to the circle. The circumferance of a circle is the measure of the circle from a point on the circle around the circle back to this point. The length of the circumference is pi times the diameter or two times pi times the radius of the circle. The value of pi is approcimately 3.14159365. As far I know no one has ever determined the exact value of pi, but many who need extreme accuracy in their computations use pi taken out to very many decimal places.
2007-06-13 23:00:00 · answer #2 · answered by David C 3 · 0⤊ 0⤋
Circumference is equal to pi*diameter of circle, or using diameter=2*radius, circumference=2*pi*radius. pi is the ratio of the circumference to the diameter of the circle.
2007-06-13 22:51:42 · answer #3 · answered by Confused about life 2 · 0⤊ 1⤋
Circumference is 2 x pi x r or pi x diameter
Diameter is 2 times the radius.
2007-06-13 22:49:48 · answer #4 · answered by Panda 3 · 0⤊ 1⤋
Circumference of a circle = 2(pi)(r) or (pi)(d)
where r = radius and d = diameter
2007-06-13 22:51:06 · answer #5 · answered by Kemmy 6 · 0⤊ 0⤋
Where does height and length come in circles?
Diameter is twice the radius.
Circumference = (diameter * pi) units.
NEVER approximate pi unless you are asked to do that or if the answer must be rounded off or approximated. pi is irrational.
Also, never forget units
2007-06-13 23:26:52 · answer #6 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 1⤋
pi usually = 3.14 in school and such, but the formula for cincumphrence of a circle is pi* diameter
2007-06-13 22:55:11 · answer #7 · answered by cmb 2 · 0⤊ 0⤋
u take the diameter and mulitply that by pie which is 3.14 or 22/7
if they give u the radius
mulityply the radius by two then mulityply it by pi
2007-06-13 22:58:30 · answer #8 · answered by Anonymous · 0⤊ 1⤋
C = 2Ïr = Ïd, where r = radius and d = diameter
2007-06-13 22:51:00 · answer #9 · answered by C-Wryte 3 · 0⤊ 1⤋
all you never wanted to know and then some...
2007-06-13 22:51:25 · answer #10 · answered by avengress 4 · 0⤊ 0⤋