Geometry Problem. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.
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Saturday, February 21, 2015
Geometry Problem 1087: Tangent Circles, Parallel, 15 Degrees, Angle
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Do you mean ∠COB=15° ?
ReplyDeleteObviously ∠COA=45°.
ReplyDeleteNow let D be the foot of perpendicular from B to OA.
Then BD/OB = CQ/OA = 1/2, thus ∠BOA=30°.
Hence, ∠COB=15°.
To Jacob
ReplyDeleteYes. Thanks