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