Online Geometry theorems, problems, solutions, and related topics.
See complete Problem 43Angles, Triangle. Level: High School, SAT Prep, College geometryPost your solutions or ideas in the comments.
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The solution is uploaded to the following link:https://docs.google.com/open?id=0B6XXCq92fLJJdTVoS3RUbVp4dVE
Reference my proof for Problem 42Let BD meet AC at G.Since Tr. ABC is isoceles and < ABC = 120-2@, < BCA = 30 +@In Tr. BCG, < GBC = 90-@ and < GCB = 30+@. So x must be 60Sumith PeirisMoratuwaSri Lanka