如图,在正方形ABCD中,AC为对角线,E为AC上一点,连接EB、ED.(1)求证:△BEC≌△DEC; (2)当BC=6,∠
如图,在正方形ABCD中,AC为对角线,E为AC上一点,连接EB、ED.(1)求证:△BEC≌△DEC; (2)当BC=6,∠
如图,在正方形ABCD中,AC为对角线,E为AC上一点,连接EB、ED.
(1)求证:△BEC≌△DEC;
(2)延长BE交AD于点F 若∠AEF=70° 求∠ADE的度数
如图,在正方形ABCD中,AC为对角线,E为AC上一点,连接EB、ED.
(1)求证:△BEC≌△DEC;
(2)延长BE交AD于点F 若∠AEF=70° 求∠ADE的度数
其他人气:910 ℃时间:2019-10-19 15:18:45
优质解答
(1)在正方形ABCD中,AC为对角线,所以角ECB=角ECD在三角形ECB和三角形ECD中BC=CD,EC=EC,∠ECB=∠ECD ∴△BEC≌△DEC(S,A,S)(2)∠AEF=70度,那么∠BEC=70度(对顶角)因为AC是角平分线,所以∠CED=70度∴ ∠AED=18...
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