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Mathematics 13 Online
OpenStudy (anonymous):

What is the diameter of this circle if BC=17 and DC=30?

OpenStudy (anonymous):

OpenStudy (callisto):

|dw:1334734918657:dw| Use Pyth Thm (17+r)^2 = 30^2 +r^2 289 + 34r +r^2 = 900 + r^2 34r = 611 r= ... Diameter = 2r= ...

OpenStudy (callisto):

The number was ugly...

OpenStudy (anonymous):

Thank you again! c: I didn't realize that it was a right triangle at first, somehow...

OpenStudy (callisto):

Whenever you see a tangent, see a centre, join them, you'll get a right angle triangle. Then, things are usually easier :)

OpenStudy (anonymous):

Oh, okay! Thanks for the tip! :D

OpenStudy (callisto):

Welcome :) Hope it helps

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