the cylinder-shape mold has 6cm diameter..but does the formula IRCUMFERENCE OF A CIRCLE=PIE TIMESZ DIAMETER right? and why? i dont get it
2007-07-19 09:50:20 · 4 answers · asked by ↕•||||•↕ 1 in Science & Mathematics ➔ Engineering
The statement C= πd is correct
The circumference of your cylinder is 6π cm.
2007-07-19 10:03:14 · answer #1 · answered by hsrch 5 · 0⤊ 0⤋
Try this. Draw a perfect circle or get something round as a reference. Take a piece of string and span it across the center(diameter). If you take that length of string, starting at some point on your reference circle's outer edge and trace it around the edges--you'll see that the diameter measured string you created wraps around the outside of the circle 3.14 times---Amazing!!
2007-07-19 17:00:37 · answer #2 · answered by scottyurb 5 · 0⤊ 0⤋
Your formula is correct. Usually it would be written like this:
C = 2*pi*r
where C is the circumference, pi is 3.14159265358979323..., and r is the radius of the circle.
2007-07-19 09:54:17 · answer #3 · answered by lithiumdeuteride 7 · 0⤊ 0⤋
The thing that you are missing is that Pi is DEFINED as circumference/diameter.
2007-07-19 10:25:47 · answer #4 · answered by Anonymous · 2⤊ 0⤋