Geometry: An Interactive Journey to Mastery



So, for our question, we do the following.

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11.31.

SS S

SSS

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4. See Figure S.22.3.
   Area     SS SS 713512222    S.


5. 36060 SS SSS^22   360120 16 13


6. By the tangent/radius theorem, we have a right
   triangle, as shown in Figure S.22.4.
   The radius of the large circle is 622  7 85 , and the
   area between the circles is SSSS  ^22 ^2    ^22


7. The shaded region in Figure S.22.5 is a “wedge” in a circle
   of radius 2. We are working with an interior
   angle x  | 180 3607 128.6°.
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7

7

10

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1

6

(^85)
13
13
Figure S.22.3
7
6
Figure S.22.4

2

2

x

Figure S.22.5