Solution:
[tex] d^2 + r^2 = e^2 [/tex]
[tex] d^2 + 20^2 = 25^2 [/tex]
[tex] d^2 = 25^2 - 20^2 [/tex]
[tex] d^2 = 625 - 400 [/tex]
[tex] d^2 = 225 [/tex]
[tex] d = \sqrt{225} [/tex]
[tex] d = \boxed{15} [/tex]
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Answers & Comments
Answer: 15
Solution:
[tex] d^2 + r^2 = e^2 [/tex]
[tex] d^2 + 20^2 = 25^2 [/tex]
[tex] d^2 = 25^2 - 20^2 [/tex]
[tex] d^2 = 625 - 400 [/tex]
[tex] d^2 = 225 [/tex]
[tex] d = \sqrt{225} [/tex]
[tex] d = \boxed{15} [/tex]