the binding runs around the circumference of the circle.
Don't you have a formula that gives the circumference of a circle of radius r?
"Laura is painting a round floor cloth to resemble a globe for her bedroom floor. She wants to sew seam binding around the edges to keep the cloth from unraveling. If the radius of the cloth is 3 yards, how much binding should she buy?"
I dont understand the radius part of everything. Please help me.
5 answers
Yes, but I dont understand it. That's why I'm asking for help.
The radius is half the diameter.
https://www.google.com/search?ei=uWeeXdrAKMzatQXqwoQ4&q=radius+circle&oq=radius+circle&gs_l=psy-ab.3..0i273j0l9.20169.27803..28131...3.4..0.118.1013.5j5......0....1..gws-wiz.......0i71j0i131j0i22i30.qArQkus6PAQ&ved=0ahUKEwiageORpZDlAhVMba0KHWohAQcQ4dUDCAs&uact=5
The circumference formula is
C = pi * 2r
https://www.google.com/search?ei=uWeeXdrAKMzatQXqwoQ4&q=radius+circle&oq=radius+circle&gs_l=psy-ab.3..0i273j0l9.20169.27803..28131...3.4..0.118.1013.5j5......0....1..gws-wiz.......0i71j0i131j0i22i30.qArQkus6PAQ&ved=0ahUKEwiageORpZDlAhVMba0KHWohAQcQ4dUDCAs&uact=5
The circumference formula is
C = pi * 2r
The number π (pi) is defined as the ratio of the circumference to the diameter. π is approximately 3.14159...
C = πd
Now, the diameter is the distance across the circle. The radius is the distance from the center of the circle to the outside. So, d = 2r.
That means C = 2πr
In your case, C = 2π*3 = 6π = 18.85
For general questions like this, consult google first. You will find many discussions and videos.
C = πd
Now, the diameter is the distance across the circle. The radius is the distance from the center of the circle to the outside. So, d = 2r.
That means C = 2πr
In your case, C = 2π*3 = 6π = 18.85
For general questions like this, consult google first. You will find many discussions and videos.
Thank you both! I think i understand it now.
1 answer