Twoafros@lemmy.world to No Stupid Questions@lemmy.world · 9 months agoMath question: how do we get an irrational number pi from the ratio of circumference and the diameter of a circle?message-squaremessage-square42fedilinkarrow-up149arrow-down13file-text
arrow-up146arrow-down1message-squareMath question: how do we get an irrational number pi from the ratio of circumference and the diameter of a circle?Twoafros@lemmy.world to No Stupid Questions@lemmy.world · 9 months agomessage-square42fedilinkfile-text
minus-squareSkyezOpen@lemmy.worldlinkfedilinkarrow-up2·9 months ago If you were to cut a string to the length of your circle’ diameter, it WILL ALWAYS wrap around by 3.14159 (or π times). Isn’t that backwards?
minus-squareAlteon@lemmy.worldlinkfedilinkarrow-up3arrow-down1·9 months agoNope. The equation is P=πD. Meaning the Perimeter is equal to 3.14 times the length of your Diameter. You can visualize it here: https://m.youtube.com/watch?v=1lQfERPjkzk
minus-squareSkyezOpen@lemmy.worldlinkfedilinkarrow-up2·9 months agoRight, so you’d need 3.14 strings of length D to cover the circle, D wouldn’t wrap around it itself.
minus-squareAlteon@lemmy.worldlinkfedilinkarrow-up3arrow-down1·9 months agoIt was implied that it would wrap around the circle. I’ll update original post to clarify better.
minus-squareSkyezOpen@lemmy.worldlinkfedilinkarrow-up3·9 months agoYeah that’s what I gathered, but it’s backwards. C = Pi D means you need pi strings, not that it’ll cover the circle pi times.
minus-squareAlteon@lemmy.worldlinkfedilinkarrow-up4·9 months agoAhhhh. I see what your saying. It’s fixed. Yeah. Did not mean to intend that it wraps fully around the circle pi times. Good catch.
Isn’t that backwards?
deleted by creator
Nope.
The equation is P=πD. Meaning the Perimeter is equal to 3.14 times the length of your Diameter.
You can visualize it here: https://m.youtube.com/watch?v=1lQfERPjkzk
Right, so you’d need 3.14 strings of length D to cover the circle, D wouldn’t wrap around it itself.
It was implied that it would wrap around the circle. I’ll update original post to clarify better.
Yeah that’s what I gathered, but it’s backwards. C = Pi D means you need pi strings, not that it’ll cover the circle pi times.
Ahhhh. I see what your saying. It’s fixed.
Yeah. Did not mean to intend that it wraps fully around the circle pi times. Good catch.