在△ABC中,∠A=90°,AD⊥BC于D,E为AC是中点,过D、E作直线交AB的延长线...

发布网友发布时间：2024-07-04 04:43

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热心网友时间：2024-08-03 02:53

证明：如图所示，过F点作AC的平行线交AD的延长线于G．

详细见附图

热心网友时间：2024-08-03 02:53

Looks like the Hyperdunk Low is prepping to be a pretty big release for Nike this year. Fresh off the heels of seeing the Hyperdunk Low Dark Grey/White we get a glimpse at a new color way with a reverse feel.

This time the shoe is in a white patent leather with white flywire. The grey sockliner can be seen through the material for a pretty cool effect that is mimicked via the icey outsole. Meanwhile grey flecks dot the midsole while the lining is a nice dark grey also. Look for them to hit select accounts sometime in the near future. via Kinstor.

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热心网友时间：2024-08-03 03:02

AB/AC=tanC

过F作GF垂直于AF，交AD延长线于G
因为E是AC中点，角ADC是直角，故EC=ED=EA
角EAD=角GDF
而角EAD=90-角DAF=角AGF
故角AGF=角GDF，FD=FG
DF/AF=FG/AF=tanGAF=tanC=AB/AC