Current location - Music Encyclopedia - Dating - (2017 Chenghai District Simulation) m right, in Rt△rBC, ∠C=90°, ∠BrC great angle bisector rD intersects BC side at D. (1) Take a point O on the side of rB as a circle
(2017 Chenghai District Simulation) m right, in Rt△rBC, ∠C=90°, ∠BrC great angle bisector rD intersects BC side at D. (1) Take a point O on the side of rB as a circle

Solution: (6) As shown in the figure, ⊙O is the circle required;

(2) BC is tangent to ⊙O.

Connect OD,

∵OA=OD,

∴∠OAD=∠ODA,

∵∠OAD=∠DAC,

∴∠ODA=∠DAC,

∴OD∥AC,

∵∠C=9n°,

∴∠BDO =9n°,

∴BC is tangent to ⊙O.