CThe area of the equilateral triangle is (√3)/4. The area of the three squares is 3*1=3. Since ∠C=360, ∠GCH=360-90-90=120°.Dropping an altitude from C to GH allows to create a 30-60-90 trangle since △GCH is isosceles. This means that the height of △GCH is and half...
答:相等.证明:\(\because \triangle \mathrm{A}\mathrm{B}\mathrm{C}≌\triangle \mathrm{A}\mathrm{E}\mathrm{F}\).\(\therefore \angle \mathit{E}\mathit{A}\mathit{F}=\angle \mathit{B}\mathit{A}\mathit{C}\).\(\therefore \angle \mathit{E}\mathit{A}\mathit{F}-\angle \ma...
TRIANGLE 400/230V 50/60Hz 72W 0.17/0.18A Nr:464654MR300D-P1N1N1N1NMR300D-P1N1N1N1NCAF90L/21-12AF 132S/2A-11 202479501-3BD80L-4B 380V 0.75KWAF 90L/8C-12 400/230V 1.7/2.9A 690 L/min 0.55KW S1AF 90L/8C-12 400/230V 1.7/2.9A 690 L/min 0.55KW S1CAF132S/2B-31 218077/...
triangle [ˈtraɪæŋɡl] 三角铁 xylophone [ˈzaɪləfəʊn] 木琴 vibraphone [ˈvaɪbrəfəʊn] 颤音琴 gong [ɡɒŋ] 锣 cymbals [ˈsɪmbəlz] 大镲 tambourine [ˌtæmbəˈriːn] 铃鼓 专业名词常见术...
implementation 'com.github.shts:TriangleLabelView:1.1.2' @@ -387,34 +388,33 @@ dependencies { implementation 'androidx.constraintlayout:constraintlayout:1.1.3' implementation 'com.github.VictorAlbertos:RxActivityResult:0.5.0-2.x' implementation 'com.jakewharton.rxbinding2:rxbinding-design:2.2.0' ...
∵△ABF、△BCD、△ACE均为底角等于B$$ 3 0 ^ { \circ } $$P的等腰 三角形(即$$ \angle F A B = \angle F B A = \angle D B C = \angle D C B = \angle $$ E$$ E A C = \angle E C A = 3 0 ^ { \circ } $$ ∴$$ \triangle A B F - \triangle B C D - \...
4已知,如图,在$\triangle ABC$中,$AB=AC$,$AD$是$BC$边上的高,$AF$是$\angle BAC$的外角平分线,$DE\text{//}AB$交$AF$于$E$,试说明四边形$ADCE$是矩形. 5已知,如图,在△ABC中,AB=AC,AD是BC边上的高,AF是∠BAC的外角平分线,DE//AB交AF于E,试说明四边形ADCE是矩形.A3E F12B DC ...
imageLink: "./Art/Joy/triangle/triangle.gif", author: "Joy", githubLink: "https://github.com/royranger", }, ] artName: 'Your art name here', pageLink: './Art/Joy/triangle/triangle.html', imageLink: './Art/Joy/triangle/triangle.gif', author: 'Joy', githubLink: 'https://github...
<CommonAlert variant="error" :icon="ExclamationTriangleIcon"> {{ selectedToken?.address === L2_BASE_TOKEN_ADDRESS selectedToken?.address.toUpperCase() === L2_BASE_TOKEN_ADDRESS.toUpperCase() ? "The fee has changed since the last estimation. " : "...
点$D$、$E$、$F$在$\triangle ABC$外,且$\angle CAB=\angle D=\angle E=\angle F$,$\angle CBA=\angle BAD=\angle BCE=\angle CAF$,则与$\triangle ABC$全等的三角形有( ) A. $0$个 B. $1$个 C. $2$个 D. $3$个 答案 由题知$\angle CAB=\angle D=\angle E=\angle F$...