Contact us
Choose a category below so we can get back to you as quickly as possible.
(1)證明:∵△ABD、△AEC都是等邊三角形,∴AD=AB,AE=AC,∠DAB=∠CAE=60°,∴∠DAC=∠BAC+60°,∠BAE=∠BAC+60°,∴∠DAC=∠BAE,∴△DAC≌△BAE,∴BE=DC.(2)因為△ABD、△ACE為等邊三角形所以AD=AB,AC= AE,角DAB=角C…
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.