Mathematics
Junior High
九上數學 求解謝謝🙋
（圓周角 圓心角）
【延伸範例 10
如右圖,在坐標平面上,
圓O與兩軸相交,且
圓周角、圓心角
進階演練 10
如右圖,所交圓於B、C
兩點,PA為圓的切線,A
為切點,PC // AD,則:
D
、4(0, 8/3)、B(0,-2/3),
圓O的半徑為10,則:
(1)0點的坐標為何? (513)
(2) <ACB =?
B
1) 9-15 A(5.5)
2x10.53-15
(2) 60°
((1)若PA=33,PB=3,
BC = 6,則CD=?
(2)AC的度數=?
82
1) 353
(2) 120°
元
85100
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