Geometry: An Interactive Journey to Mastery

Solutions

2. D௘ͽ xy 2222 81.
   E௘ͽ xy 32 2 16.
   F௘ͽ ̈ ̧ ̈ ̧§·§·©¹©¹xy 231611122.
   G௘ͽ xy 0.67^22 9.21 0.01.


3. D௘ͽ Cr  2, 1 ; 13.
   E௘ͽ 7 2^22 11 1 169. Yes.
   F௘ͽ 7 2z^22 11 1 169. No.
   G௘ͽ
   22
   2

2 2 1 169

0 1 169

113or13

 RU 

y

y

y

y





 



 7KHUHDUHWZRSRLQWVͼ௘௘ͽDQGͼ௘í௘ͽ

H௘ͽ

22

2

2

2 12 1 169

2 169 169

20

20

2.

x

x

x

x

x









 7KHUHLVRQO\RQHSRLQWͼ௘௘ͽ

I௘ͽ r VRWKHGLDPHWHU ௘6HHFigure S.20.1௘ͽ

7KHKRUL]RQWDOSDLURUWKHYHUWLFDOSDLULVWKHHDVLHVWWR¿QG

4. ௘r  3227 58 ,VRͼ௘x௘ͽ^2 ͼ௘yí௘ͽ^2 = 58.


5. 7KHUDGLXVLV6Rͼ௘x௘ͽ^2 ͼ௘yí௘ͽ^2  ௘6HHFigure S.20.2௘ͽ

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ͼíͽ ͼíͽ

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Figure S.20.1

í

 6

Figure S.20.2