共50条信息
如图,将矩形\(ABCD\)沿\(CE\)向上折叠,使点\(B\)落在\(AD\)边上的点\(F\)处\(.\)若\(AE=\)\( \dfrac{3}{8}\)\(CD\),则\(EF\)与\(CF\)的比值是________.
如图,已知\(\triangle ABC\)中,\(AC=BC\),点\(D\)、\(E\)分别在边\(AB\)、\(BC\)上,把\(\triangle BDE\)沿直线\(DE\)翻折,使点\(B\)落在\(B{{'}}\)处,\(DB{{'}}\)、\(EB{{'}}\)分别交\(AC\)于点\(F\)、\(G\),若\(∠ADF=66^{\circ}\),则\(∠EGC\)的度数为_____.
如图,在\(Rt\triangle ABC\)中,\(∠CAB=90^{\circ}\),\(∠C=25^{\circ}\),\(D\)是\(BC\)上一点,将\(Rt\triangle CAB\)沿\(AD\)折叠,使\(B\)点落在\(AC\)边上的\(E\)处,则\(∠CDE\)等于________.
如图,\(\vartriangle ABE\)和\(\vartriangle ACD\)是\(\vartriangle ABC\)分别沿\(AB\)、\(AC\)边翻折\(180{}^\circ \)形成的,若\(\angle BAC=150{}^\circ \),则\(\angle \theta {=}\)_____
将\(\Delta ABC\)的纸片按如图所示的方式折叠,使点\(B\)落在边\(AC\)上,记为点\({B}{{'}}\),折叠痕为\(EF\),已知\(AB=AC=8\),\(BC=10\),若以点\({B}{{'}}\)、 \(F\)、 \(C\)为顶点的三角形与\(\Delta ABC\)相似,那么\(BF\)的长度是 .
如图,在\(Rt\Delta ABC\)中,\(∠C=90^{\circ}\),\(∠B=30^{\circ}\),\(BC=3\)点\(D\)是\(BC\)边上一动点\((\)不与点\(B\)、\(C\)重合\()\),过点\(D\)作\(DE⊥BC\)交\(AB\)边于点\(E\),将\(∠B\)沿直线\(DE\)翻折,点\(B\)落在射线\(BC\)上的点\(F\)处,当\(\triangle AEF\)为直角三角形时,\(BD\)的长为________
如图,在\(\triangle ABC\)中,\(\angle ACB=90{}^\circ \),\(AB=5\),\(BC=3\),\(P\)是\(AB\)上一个动点\((\)与点\(B\)不重合\()\),将\(\triangle BCP\)沿\(CP\)所在直线翻折得到\(\triangle B’CP\),连结\(AB{{{'}}}\),则\(AB{{{'}}}\)长度的最小值是____________________.
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