锟斤拷锟叫旓拷(sh锟斤拷)锟絎(xu锟斤拷) 锟紸锟斤拷锟斤拷锟絃計锟姐公式

锟节古达拷锟斤拷锟紷锟斤拷锟斤拷锟絵锟阶猴拷锟斤拷锟斤拷賴锟节岋拷锟斤拷锟侥歸锟絳锟斤拷锟剿傦拷锟节斤拷(j锟斤拷ng)锟斤拷邪l(f锟斤拷)锟紽(xi锟斤拷n)锟紸锟斤拷锟斤拷锟絃锟絚直锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷(sh锟斤拷)锟侥比ｏ拷锟斤拷锟斤拷锟紷锟斤拷锟斤拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟紸锟斤拷锟斤拷(锟斤拷锟斤拷記锟斤拷π)锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷锟紸锟斤拷锟絃锟斤拷锟角ｏ拷C = π ×d 锟斤拷锟斤拷C=2×π×r(锟斤拷锟斤拷d锟角圓锟斤拷直锟斤拷锟斤拷r锟角圓锟侥半徑)锟斤拷

锟紸锟斤拷锟斤拷

锟斤拷锟斤拷臄锟�(sh锟斤拷)锟絎(xu锟斤拷)锟揭傦拷锟斤拷锟斤拷锟絢锟斤拷锟斤拷锟斤拷@锟斤拷π锟侥撅拷锟絯值锟斤拷锟斤拷(sh锟斤拷)锟絎(xu锟斤拷)锟揭勶拷锟斤拷锟矫碉拷锟斤拷“锟斤拷A锟絞(sh锟斤拷)”锟侥凤拷锟斤拷锟斤拷也锟斤拷锟斤拷锟矫圓锟侥冿拷(n锟斤拷i)锟斤拷锟斤拷锟斤拷邊锟轿猴拷锟斤拷锟斤拷锟斤拷锟斤拷邊锟轿碉拷锟斤拷锟絃锟狡斤拷锟紸锟斤拷锟絃锟斤拷锟斤拷脠A锟接斤拷192邊锟斤拷锟斤拷锟斤拷脠A锟斤拷锟绞达拷s锟斤拷3.14锟斤拷[1]

锟斤拷A锟絞(sh锟斤拷)锟侥达拷锟铰凤拷锟斤拷锟斤拷锟叫學(xu锟斤拷)锟侥旓拷(sh锟斤拷)锟絎(xu锟斤拷)锟教诧拷锟较撅拷锟斤拷锟斤拷然锟斤拷锟斤拷須匡拷锟斤拷锟斤拷锟斤拷锟杰达拷潭锟斤拷锟街伙拷锟接嬶拷锟紸锟斤拷锟绞的凤拷锟斤拷锟斤拷锟斤拷锟紸锟斤拷锟絃锟斤拷C = π * d锟狡猴拷锟窖斤拷(j锟斤拷ng)锟斤拷锟铰岋拷锟斤拷锟斤拷锟紷一锟斤拷锟斤拷锟紿锟紿锟角讹拷锟斤拷π锟斤拷值锟斤拷锟斤拷锟叫硷拷(x锟斤拷)锟斤拷锟斤拷锟街�锟斤拷锟紷锟斤拷锟斤拷锟叫嗭拷锟絵锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷]锟叫忥拷邏輯锟斤拷锟紺锟斤拷锟紸锟斤拷锟斤拷锟絃锟絖锟斤拷锟斤拷锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷锟組(j锟斤拷n)一锟斤拷锟絝锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絃锟侥革拷锟斤拷也锟紿锟斤拷直锟絕锟较碉拷锟斤拷锟斤拷锟斤拷锟皆的★拷

锟紸锟斤拷锟绞碉拷锟狡岋拷(d锟斤拷o)锟絕锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷論锟较囷拷(y锟斤拷n)锟斤拷锟狡岋拷(d锟斤拷o)锟紸锟斤拷锟斤拷锟絃锟斤拷锟斤拷锟劫囷拷锟斤拷锟斤拷姆锟斤拷锟斤拷锟�(sh锟斤拷)锟絎(xu锟斤拷)锟斤拷锟斤拷锟斤拷微锟絜锟街碉拷使锟矫诧拷锟斤拷锟斤拷

锟狡岋拷(d锟斤拷o)锟紸锟斤拷锟絃锟筋簡锟斤拷锟斤拷锟絢锟斤拷锟斤拷锟矫積锟斤拷锟斤拷

锟斤拷平锟斤拷直锟斤拷锟斤拷锟斤拷(bi锟斤拷o)锟铰圓锟侥凤拷锟斤拷锟角ｏ拷

锟紷锟斤拷锟皆岋拷锟缴咃拷锟斤拷(sh锟斤拷)锟斤拷锟教ｏ拷

x = r * Cos t

y = r * Sin t

t∈[0, 2π]

锟斤拷锟角圓锟斤拷锟絃锟斤拷锟斤拷

C = ∫√( (x'(t))^2 + (y'(t))^2 ) dt锟斤拷t锟斤拷0锟絜锟斤拷2π.

锟結(ji锟斤拷)锟斤拷锟斤拷然锟斤拷锟斤拷C = 2π * r

(注锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)一锟斤拷亩锟斤拷x锟斤拷锟斤拷賴锟节圓锟斤拷锟斤拷锟絃锟斤拷锟斤拷e锟斤拷锟斤拷锟斤拷锟剿憋拷锟斤拷邏輯锟较碉拷循锟絟(hu锟斤拷n)論锟紺锟斤拷锟斤拷锟皆帮拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟斤拷锟秸旓拷锟侥冪級锟斤拷(sh锟斤拷)锟斤拷e锟街侊拷锟斤拷锟絰锟斤拷锟斤拷锟斤拷賴锟节幾猴拷锟斤拷锟剿時锟紸锟斤拷锟绞就诧拷锟斤拷锟缴圓锟斤拷锟絰锟侥筹拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟皆得碉拷锟侥筹拷锟斤拷(sh锟斤拷))

锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷

锟斤拷锟斤拷锟竭匡拷锟斤拷(sh锟斤拷)锟絎(xu锟斤拷)锟斤拷(f锟斤拷)锟斤拷(x锟斤拷)锟斤拷锟斤拷

锟斤拷锟铰高匡拷锟結訊锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷(zh锟斤拷n)锟斤拷锟斤拷志愿锟斤拷锟�锟斤拷锟饺★拷锟�?j锟斤拷n)?sh锟斤拷)锟斤拷锟斤拷

锟竭匡拷锟絩锟絞锟斤拷锟斤拷全锟斤拷锟斤拷要锟斤拷(ji锟斤拷)锟絚

锟組锟斤拷"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號