Proposed Problem
Click the figure below to see the complete problem 407 about Circle, Angle, Tangent, Perpendicular, Secant, Radius, Center.
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Complete Problem 407
Level: High School, SAT Prep, College geometry
Thursday, December 24, 2009
Problem 407. Circle, Angle, Tangent, Perpendicular, Secant, Radius, Center
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join D to O, D to E
ReplyDelete=> ang DEG = DHA = x ( same arc DF )
ang DEG = EDO = x ( internal ang , DO // GC )
ang EDO = OED = x ( OD = OE = radius)
=> ang OEG = 2x = 40
=> x = 20