Toán Lớp 7: 8. cho goc xOy. Lay diem A tren Ox, diem B tren Oy sao cho OA = OB. Goi K la giao diem Ab voi tia phan giac cua goc xOy.Chung minh
1) AK = KB
2) OK vuong goc AB
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Toán Lớp 7: 8. cho goc xOy. Lay diem A tren Ox, diem B tren Oy sao cho OA = OB. Goi K la giao diem Ab voi tia phan giac cua goc xOy.Chung minh
1) AK = KB
2) OK vuong goc AB
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