SOLUTION: The distance between the centres of the two circles with radii 4 cm and 9 cm is 13 cm. The length of the direct common tangent (betweeen the two points of contact)=?

Algebra ->  Circles -> SOLUTION: The distance between the centres of the two circles with radii 4 cm and 9 cm is 13 cm. The length of the direct common tangent (betweeen the two points of contact)=?      Log On


   

Question 704068: The distance between the centres of the two circles with radii 4 cm and 9 cm is 13 cm. The length of the direct common tangent (betweeen the two points of contact)=?
Answer by Alan3354(69443) About Me  (Show Source):
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The distance between the centres of the two circles with radii 4 cm and 9 cm is 13 cm. The length of the direct common tangent (betweeen the two points of contact)=?
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d+=+sqrt%2813%5E2+-+5%5E2%29+=+sqrt%28144%29 cm
= 12 cm