I'm helping my daughter with her math homework. Will someone please refresh my memory? : estimate the diameter of a wheel that has a circumference of 31 inches....Is she supposed to multiply by 3.14?
2007-02-12 14:10:41 · 7 answers · asked by azile_wehttam 3 in Education & Reference ➔ Homework Help
C = pi*d
31 = pi*d
31/pi = d
d = 9.87
2007-02-12 14:17:54 · answer #1 · answered by vegasdog 2 · 1⤊ 0⤋
Here's a link to keep handy- they have a great site for Math Help.
http://www.mathgoodies.com/lessons/vol2/circumference.html
And to answer- if you divide the circumference x Pi, you'll have the diameter. Remember this- The circumference is always the largest measurement of a circle...it can help when you're in a bind.
2007-02-12 22:17:10 · answer #2 · answered by bkfd202 2 · 0⤊ 0⤋
yeah id say 10 inches diameter times 3.14, since its an estimation it doesnt need to be exact
2007-02-12 22:14:21 · answer #3 · answered by ? 4 · 0⤊ 0⤋
To find the circumference, I believe the equation is pi x radius squared. I hope this helps!
2007-02-12 22:23:07 · answer #4 · answered by Yadi 2 · 0⤊ 1⤋
yes because circumference is pi times diameter: C=pi d.
2007-02-12 22:14:43 · answer #5 · answered by reader27 2 · 0⤊ 0⤋
okay circumference is = pi*d
pi= 3.14
d= the diameter
31=pi*d
i would plug in my 31 and just divide by pi. dont multiply!
2007-02-12 22:15:54 · answer #6 · answered by lvlorph 2 · 0⤊ 0⤋
multiply 3 times its diamiter
pi=3.14 or just.....pi lol
2007-02-12 22:15:40 · answer #7 · answered by djsjr 5 · 0⤊ 0⤋