Contact us
Choose a category below so we can get back to you as quickly as possible.
BE=CF,理由:∵AE為⊙O的直徑,AD⊥BC∴∠ABE=90°=∠ADC∵∠AEB=∠ACB(同弧所對的圓周角相等),∴∠BAE=∠CAF(等角的餘角相等)∴BE=CF∴BE=CF.
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.