ΔABC≌ΔADE角CAE=10度角B=角D=
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角B=80度.因为:三角形ABC全等于三角形ADE.所以:角B=角D,角E=角C=20度,角BAC=角DAE,已知:角C=角E=20度,角EAC=40度,角BAD=120度因为:角EAD=角EAC+角
1)△ABC∽△ADE证:∵∠BAD=∠CAE ∴∠BAD+∠DAC=∠CAE+∠DAC &nb
(1)△ABC∽△ADE,△ABD∽△ACE(2分)(2)①证△ABC∽△ADE,∵∠BAD=∠CAE,∠BAD+∠DAC=∠CAE+∠DAC,即∠BAC=∠DAE.(4分)又∵∠ABC=∠ADE,∴
△ABD∽△ACE你已经证明△ABC∽△ADE那么得AB/AC=AD/AE∠BAD=∠CAE△ABD∽△ACE(边角边)
1) ∵ ∠BAD=∠CAE 即 ∠BAD+∠DAC=∠CAE+∠DAC ∴ ∠BAC=∠D
∵∠BAD=∠CAE,∴∠BAD-∠CAD=∠CAE-∠CAD,即∠BAC=∠DAE,在△ABC和△ADE中,AB=AD∠BAC=∠DAEAC=AE,∴△ABC≌△ADE.
DE与AC垂直.因为△ABC≌△ADE所以∠C=∠E=50°又因为∠CAE=40°所以∠AFE=90°即DE与AC垂直
因为全等三角形,所以角BAC=角DAE;所以角BAC-角DAC=角DAE-角DAC;即角BAD=角CAE再答:给好评啊
因为AB=AE,AC=AD,BC=DE所以三角形CAB全等于三角形EAD所以角CAB=角EAD因为角DAB=角DAC+角CAB角CAE=角CAD+角DAE所以角DAB=角CAE
相似因为∠BAD=∠CAE,所以∠BAC=∠DAE又因为∠ABC=∠ADE所以△ABC∽△ADE所以AD/AE=AB/AC在△ABD和△ACE中AD/AE=AB/AC,∠BAD=∠CAE所以△ABD∽
因为三角形全等,所以角bac等于角dae所以角bad等于角cae
20°因为△ABC≌△ADE,所以∠BAC=∠DAE∠BAD=∠BAC-∠DAC∠CAE=∠DAE-∠DAC=20
∠BAC=∠DAE所以∠CAE=∠BAD再问:等于多少度
证明:∵∠BAC=∠BAD+∠DAC,∠DAE=∠CAE+∠DAC,∠BAD=∠CAE∴∠BAC=∠DAE(等量代换)∵∠ABC=∠ADE∴△ABC∽△ADE
因为∠BAD=∠CAE,所以∠BAD+∠CAD=∠CAE+∠CAD,即∠BAC=∠DAE.在△ABC和△ADE中,因为AC=AE,∠C=∠E,∠BAC=∠DAE,由角边角定理,△ABC≌△ADE.
(1)因为△ABC≌△ADE,所以∠BAC=∠DAE,所以∠BAC-∠EAC=∠DAE-∠EAC,即∠BAE=∠DAC,所以∠BAE=1/2(∠BAD-∠CAE)=1/2(108°-40°)=34°所
图中相似三角形有△ABC与△ADE,△ABD与△ACE证明:∵∠BAC=∠BAD+∠DAC,∠DAE=∠CAE+∠DAC,∠BAD=∠CAE∴∠BAC=∠DAE∵∠ABC=∠ADE∴△ABC相似于△A
(1)∵∠BAD=∠CAE,∠DAC=∠DAC.∴∠BAC=∠DAE,又∵∠ABC=∠ADE.∴△ABC∽△ADE,(AA)∴AB:AC=AD:AE°∵∠BAD=∠CAE∴△ABD∽ACE(SAS)(