关于bead的百科

• 已知：如图，△BCE、△ACD分别是以BE、AD为斜边的直角三角形，且BE=AD，△CDE是等边三角形．求*：...

• 问题详情：已知：如图，△BCE、△ACD分别是以BE、AD为斜边的直角三角形，且BE=AD，△CDE是等边三角形．求*：△ABC是等边三角形．【回答】详解：∵△CDE是等边三角形，∴EC=CD，∠1=60°．∵BE、AD都是斜边，∴∠BCE=∠ACD=90°在Rt△BCE和Rt△ACD中，EC＝DC，BE＝AD∴Rt△BCE≌Rt△ACD(HL)．∴BC=AC．∵∠1+∠2...
• 2021-03-0426730

• jade bead造句怎么写

• Juehangadornjadebeadcentralgap.Thecrispcrashofraindropssplashed,andthenthesoundofjadebeadsshattered.Thetotalpopulationisjust330,000andthespectacularappearancefromabovehasbeenlikenedtoanecklaceofspeckledjadebeads.ThenIgaveMulansomespecialgifts."anapp...
• 2018-10-159880

• bead造句怎么写

• Hewentoutthroughthebeadcurtain.Sheaccidentallyswallowedaglassbead.Apaperclip(orlargeplasticbead).Thetoywouldonlytakethebeadpairhorizontally,butdespitethis,thechildrenheldthebeadpairverticallytotesteachbeadseparately.Firstly,beadshopsareavailableinsho...
• 2018-01-1113473