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如图,AB是⊙O的直径,点C在⊙O上,将弦AC、BC所对的劣弧分别沿AC、BC翻折,将AB上方所对的半圆沿AB翻折.若AC=4,BC=3,则翻折后的三条弧组成两个“叶片形”图形(阴影部分)的周长和为...
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教案备课库《初三年级同修学案201532024B》真题及答案
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已知⊙O.的直径AB=10弦BC=6点D.在⊙O.上与点C.在AB两侧过点D.作⊙O.的切线PD.Ⅰ
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在⊙O中AB为直径点C为圆上一点将劣弧沿弦AC翻折交AB于点D连结CD.1如图1若点D与圆心O重合A
在⊙O.中直径AB=6BC是弦∠ABC=30°点P.在BC上点Q.在⊙O.上且OP⊥PQ.1如图1当
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如图AB是⊙O的直径点D在⊙O上∠BOD=130°AC∥OD交⊙O于点C连接BC则∠B=度.
如图所示AB是⊙O.的直径AC是⊙O.的弦∠ACB的平分线交⊙O.于点D.若AB=10AC=6求BC
如图C.是以AB为直径的⊙O上一点已知AB=5BC=3则圆心O.到弦BC的距离是.
.在⊙O.中直径AB=6BC是弦∠ABC=30°点P.在BC上点Q.在⊙O.上且OP⊥PQ.Ⅰ如图①
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如图3-70所示在⊙O.中AB是直径弦AC=12cmBC=16cm∠ACB的平分线交⊙O.于点D.求
如图AB是⊙O的直径弦CD⊥AB与点E点P在⊙O上∠1=∠C1求证CB∥PD2若BC=3sin∠P=
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