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jonny [76]
3 years ago
12

100 points! Solve for #2 and #3.

Mathematics
2 answers:
aniked [119]3 years ago
7 0

2. radius = AB = 6


3. radius = AB = 3√7


brilliants [131]3 years ago
6 0
2. By the secant rules,
  BC² = DC*(DC +diameter)
Substituting the given information, you have
  8² = 4*(4 +2*radius)
  64 = 16 +8*radius
  48/8 = radius = 6

radius = AB = 6


3. By the Pythagorean theorem,
  AC² = BC² +AB²
Substituting the given information, you have
  12² = 9² +AB²
  144 -81 = AB² = 63
  AB = √63 = 3√7

radius = AB = 3√7
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