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Mathematics 22 Online
OpenStudy (anonymous):

For the triangle shown, find the length AD.

OpenStudy (anonymous):

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OpenStudy (agent0smith):

Find BCD first: sinB/12 = sinBCD/12 ... or just notice it's isosceles, so BCD is 25 degrees. That makes BCA 50 degrees. Now you can find angle A, and use the sine rule to find DA.

OpenStudy (agent0smith):

Or find angle BDC, since 25+25+BDC = 180. Then find angle A.

OpenStudy (anonymous):

Alright. :) Thanks so much!

OpenStudy (agent0smith):

No prob :)

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