Aug 29, 2026

EP222｜圓形

幾何圖形中，圓的形狀可以看成「無限多邊形」，好比我們自己家的地板是平的，可是到外太空看，地球卻是圓的一般。當越多角，也就越多邊時，確實會變成圓形。當圓轉動時，有一個點不會動，這就是「圓心」，通過圓心的最長直線就是直徑，直徑的一半就是半徑。而圓周長是直徑乘以圓周率，如果我們依照半徑來切開圓，像切披薩那樣，然後把它上下顛倒重複排列。如果切得夠細，那麼排出來的形狀就越像長方形，長度是一半的圓周長，而寬就是半徑，所以圓的面積就是半徑乘以半徑乘以圓周率了。當一條直線跟圓或是兩個圓只有一個交點時，它們是相切，兩個相切的圓有無線多條公切線。兩個圓有兩個交點，那麼它們是相交，相交的圓有兩條公切線，公切線平行，那麼兩個圓相同，如果公切線會相交則一大一小。開車時遇到彎路，如果開在前車的外側車道，那麼就要小心前壓到東西，然後沿著切線方向彈到外側車道。講客電臺官網 : https://www.hakkaradio.org.tw/ 講客電臺臉書粉專 : https://www.facebook.com/hakkaradio105.9?locale=zh_TW

Episode details come from the podcast's RSS feed.

Embed this episode

Attribution link and audio player

Ready to play

EP222｜圓形

No transcript yet.

Requests help us decide what to transcribe next.

Share this episode

Similar podcasts

The Course Mentors Podcast The Course Mentors Hey there, future course creator! Ever feel like turning your know-how into an online course is like trying to solve a Rubik's cube blindfolded? Well, grab your headphones because "The Course Mentors Podcast" is here to be your secret weapon! Meet Aimee and Odette (that's us!), your new best friends in the course creation world. We've been in the trenches for over a decade, and for the last five years, we've been rocking the online course space. Now we're here to spill all our secrets in bite-sized, 15-20 minute episodes that'll fit perfectly in your coffee breaks. No fluff, no filler - just real, actionable advice that'll take you from "um, what's a landing page?" to "holy moly, I just hit six figures!". We're talking everything from crafting your course to marketing it like a pro and building a business that'll have you pinching yourself. Whether you're dreaming of ditching the 9-to-5 grind, adding a sweet extra income str

Frequently asked questions

When was this 講客廣播電臺 I 與寧學客話 episode published?

This episode was published on August 29, 2026.

Can I download this 講客廣播電臺 I 與寧學客話 episode?

Yes. Use the download control on the episode player to save the publisher-provided media file.