Question

Pe//

求解

vnat will
unperiments, no e
IS what she
would say when her expe
ut turn out good, and
I heard that a lot.
My father
and he loved to cook, too.
He ofter
curu tacn other or not
)21. (A) This is not possible everywhere
(B
(B) This is not surprising
(C) It is no good news for everyone
( (D) It cannot be this way for very long
“$n;
431
11V
dy18
" wa
Co
viai
27 mother
5 52
625
45
2
7
(1)
Bro
028. 桌面上平行放置兩個邊長分別為37公分、45 公分的正方形積
木,並在兩個積木間隔的上方放置一顆半徑25公分的圓球,如
右圖所示,若兩積木的間隔x公分,且圓球的最底端離桌面的
距離為27公分,則x=?
(A
(A) 39
(B) 40
(C) 44
(D) 45
45
37
27"
hin
45
tle
()
B
me
ft
021. 如右圖,大圓O1 和小圓O2 內離,點01 在圓O. 內部,已知圓 01上有
A、BB、P三點,AB切圓O2 於C點,CP交圆O2於Q點,且Ol、O2
在CP上,若AB=30,PQ=1,0002=4,求圓O2的半徑為何?
(A) 10
(B) 12
(C) 13
(D
(D) 15
ob
B
Th
Afte

Answer 1

我就是我

y=√(25²-15²)=20
z=√(25²-7²)=24
x=y+z=20+24=44
選(C)
看不懂就再追問