如图,三角板ABC中,∠ACB=90°,∠B=30°,BC=根号3,三角板绕直角顶点C逆时针旋转,当点A的对应点A‘落在AB边的起始位置上时即停止转动,则点B转过的路径长为多少?（结果保留π）

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如图,三角板ABC中,∠ACB=90°,∠B=30°,BC=根号3,三角板绕直角顶点C逆时针旋转,当点A的对应点A‘落在AB边的起始位置上时即停止转动,则点B转过的路径长为多少?（结果保留π）如图,三

如图,三角板ABC中,∠ACB=90°,∠B=30°,BC=根号3,三角板绕直角顶点C逆时针旋转,当点A的对应点A‘落在AB边的起始位置上时即停止转动,则点B转过的路径长为多少?（结果保留π）
如图,三角板ABC中,∠ACB=90°,∠B=30°,BC=根号3,三角板绕直角顶点C逆时针旋转,当点A的对应点A‘落在AB边的起始位置上时即停止转动,则点B转过的路径长为多少?（结果保留π）

如图,三角板ABC中,∠ACB=90°,∠B=30°,BC=根号3,三角板绕直角顶点C逆时针旋转,当点A的对应点A‘落在AB边的起始位置上时即停止转动,则点B转过的路径长为多少?（结果保留π）
转过60度,路径长√3π/3

Lively new Milan signing talented pupils

Milan,
the sort of individual? Why AC Milan are willing to make use of the 6.five million put into concern rookie Angela Merkel in return for h...

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Lively new Milan signing talented pupils

Milan,
the sort of individual? Why AC Milan are willing to make use of the 6.five million put into concern rookie Angela Merkel in return for half ownership of his? Listen to some of the Italian football legend, who in his evaluations, you may be able to deepen the talent with the 19-year-old striker understanding.
Genoa last season on loan towards the effectiveness of Padua, Padua coach, teammates have carried out before, and Baggio Brescia Serie A defensive backbone of calories commented the young players: "It is apparent that this child capability is outstanding, or AC Milan wouldn't be so fast to sign him. AC Milan is not his position? I don't think so,wholesale man's shoes, remain in Milan even more than playing the game really advanced of coaching, he will be very rapid progress helpful. position may be flexible arrangements within the reserve, he played left midfield, i quickly play more with his attacking midfielder or second striker, that they will facilitate the perfect mixture of speed and technology In short, he is very good, Milan is a treasure. "technical coach Alessandro Padua - Total Cantor is also played in teams such as Juventus and Vicenza in Serie A champion, discussed his Enlightenment had outstanding students, he said: "He is really a shining star, will turn out to be a true champion player, he jogs my memory of Kaka."
AC Milan is in charge of operating the transfer of some well-known agent Enneisituo heavy - In a interview with Bloomberg Zedi "full market" interview, also praised the Milan deal done pen wise: "This child has been worth not much less than 25 million,wholesale women's shoes, but AC Milan's mode of operation is very smart. look at it, will soon surpass his achievements Cavani and Pastore. "" Sky Sports "well-known commentator Claudio - Fritz said ono : only 19 years old, but he has totally prove that they have outstanding potential, very couple of people in this early age begun to emerge, I'm able to believe of the latest local players,wholesale watches, only Inzaghi and Gilardino within the exact same age have had such outstanding talent. and Nei Maer within the kind of play, individual skills and position are similar, although it now appears the space and Brazilians than some,wholesale women's clothing, however in AC Milan to good craftsmanship,wholesale handbags, past the Brazilian is not impossible. "

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2π

如图,三角板ABC中,∠ACB=90°,AB=4,∠A=30°,三角板ABC绕直角顶点C顺时针旋转90°得到△A1B1C,求这个过程中三角板AB边所扫过图像的面积.最好说得易懂点. 有一块直角三角板XYZ放置在△ABC上,恰好三角板XYZ的两条直角边XY、XZ分别经过点B、C．△ABC中,∠A=30°,则∠ABC+∠ACB= .. ,∠XBC+∠XCB= ?如图2,改变直角三角板XYZ的位置,使三角板XYZ的两条直如图1,有一块直角三角板XYZ放置在△ABC上,恰好三角板XYZ的两条直角边XY、XZ分别经过点B、C．△ABC中,∠A＝30°,则∠ABC＋∠ACB＝度,∠XBC＋∠XCB＝度；如图2,改变直角三角板XYZ的位置,使三角板XY 如图1,有一块直角三角板XYZ放置在△ABC上,恰好三角板XYZ的两条直角边XY、XZ分别经过点B、C．△ABC中,∠A＝30°,则∠ABC＋∠ACB＝度,∠XBC＋∠XCB＝度；如图2,改变直角三角板XYZ的位置,使三角板XY 如图所示,形如量角器的半圆O的直径DE=12cm,在形如三角板的△ABC中,∠ACB=90°,∠ABC=30°,BC=12cm. 如图,量角器的半圆O的直径DE=12cm.在三角板的三角形ABC中如图所示,形如量角器的半圆O的直径DE=12cm,形如三角板的△ABC中,∠ACB=90°,∠ABC=30°,BC=12cm,半圆O以2cm/s的速度从左向右运动,在运动过程中, 如图,在Rt△ABC中,∠ACB=90°,∠A=30°,BC=1.将三角板中30°角的顶点D放在AB边上如图,在Rt△ABC中,∠C=90°,∠A=30°,BC=1,将三角板中一个30°角的顶点D放在AB边上移动,使这个30°角的两边分别与△ABC的边AC 如图,三角板ABC中,∠ACB=90 °,∠B=30°,BC=6.三角板绕直角顶点C逆时针旋转,当点A的对应点A'落在AB边的起始位置时即停止转动,则B点转过的路径长为如图,三角板ABC中,∠ACB=90 °,∠B=30°,BC=6.三角板绕直角顶点C逆时针旋转,当点A的对应点A'落在AB边的起始位置时即停止转动,则B点转过的路径长为.注：起始位置指哪里? 如图,三角板ABC中,∠ACB=90°,∠B=30°,BC=根号3,三角板绕直角顶点C逆时针旋转,当点A的对应点A‘落在AB边的起始位置上时即停止转动,则点B转过的路径长为多少?（结果保留π）（1）如图1,有一块直角三角板XYZ放置在△ABC上,恰好三角板XYZ的两条直角边XY、XZ分别经过点B、C、△ABC中,∠A=40°,则∠ABC+∠ACB= 度,∠XBC+∠XCB= 度；（2）如图2,改变（1）中直角三角板XYZ 16、（1）如图1,有一块直角三角板XYZ放置在△ABC上,恰好三角板XYZ的两条直角边XY、XZ分别经过点B、C、△ABC中,∠A＝30°,则∠ABC＋∠ACB＝度,∠XBC＋∠XCB＝度；（2）如图2,改变直角三角板XYZ的如图1,一副直角三角板满足AB=BC,AC=DE,∠ABC=∠DEF=90°,∠EDF=30°,∠ACB=45°.如图1,一副直角三角板满足AB＝BC,AC＝DE,∠ABC＝∠DEF＝90°,∠EDF＝30°,∠ACB＝45°.【操作】将三角板DEF的直角顶点E放置于三角如图,△ABC和△CDE都是直角三角板,∠ACB=∠DCE=90°,∠ABC=∠CDE=30°(1)求证,:AE⊥BD 有一副直角三角板,在三角板ABC中,∠BAC=90 °,AB=AC=6,在三角板DEF中,∠FDE=90,DF=4,DE=4√ 3,将这副三角板如图（1）所示位置摆放,点B与点F重合,直角边BA与FD在同一条直线上.现固定三角板ABC,将三角板D 如图,已知△ABC是等腰直角三角形,∠C=90度．（1）操作并观察,如图,将三角板的45°角的顶点与点C重合（1）操作并观察，如图，将三角板的45°角的顶点与点C重合，使这个角落在∠ACB的内部，初一认识三角形（1)如图①,有一块直角三角板XYZ放置在△ABC上,恰好△XYZ的两条直线边XY,XZ分别进过点B、C,在△ABC中,∠A=30º,求∠ABC+∠ACB和∠XBC+∠XCB的大小；（2）如图②,改变直角三角板的如图,在△ABC中,∠B=60°,∠BAC,∠ACB的平分线AD,CE相交于点O,求证,AE+CD=AC1.在△ABC中,∠B=60°,∠BAC,∠ACB的平分线AD,CE相交于点O,求证,AE+CD=AC2.有一大一小两块透明的等腰直角三角板(△ABC和△DEF),∠ACB