Home Geometry Mind Map Problems All Problems Circle 491-500 Semicircle Post a solution        By Antonio Gutierrez
Problem 494. Circular Sector, 90 Degrees, Semicircle, Chord, Parallel.
Level: High School, College, SAT Prep.

The figure shows a circular sector AOB of 90 degrees with radius 4. OA is the diameter of semicircle O' and line AEC is equal and parallel to BD. Find DE.
 

Circular sector 90 degrees
 


 

 

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