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Problem 2.
Triangle, Angles. Level: High School, SAT Prep, College
geometry |
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Prove the following: if, in a triangle
ABC, mÐ
BAO = mÐ
OAC = 20°, mÐ
ACO = 10°,and mÐ
OCB = 30°, then mÐ
OBC = 80°.
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