May 2021 1 260 Report
Giup em bai toan nay voi?

Cho duong tron tam (O) duong kinh AB=2R. Ve cung tron tam B ban kinh R cung nay cat (O) o D va C

a) Tu giac ODBC la hinh gi?

b) Tinh goc CDB, CDO

c) Chung minh: Tam giac ADC deu

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