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發表於:2021-03-04
問題詳情:已知:如圖,△BCE、△ACD分別是以BE、AD為斜邊的直角三角形,且BE=AD,△CDE是等邊三角形.求*:△ABC是等邊三角形.【回答】詳解:∵△CDE是等邊三角形,∴EC=CD,∠1=60°.∵BE、AD都是斜邊,∴∠...
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發表於:2018-01-11
Hewentoutthroughthebeadcurtain.Sheaccidentallyswallowedaglassbead.Apaperclip(orlargeplasticbead).Thetoywouldonlytakethebeadpairhorizontally,butdespitethis,thechildrenheld...
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發表於:2018-10-15
Juehangadornjadebeadcentralgap.Thecrispcrashofraindropssplashed,andthenthesoundofjadebeadsshattered.Thetotalpopulationisjust330,000andthespectacularappearancefromabovehas...