Online Geometry Problem 936: Circle, Semicircle, Diameter, Tangent, Radius, Chord, Metric Relations. Level: High School, SAT Prep, College, Mathematics Education

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The figure below shows a semicircle of center O and diameter AB. OC is perpendicular to AB and circle Q is tangent to AB at D and the semicircle O at E. If CD = 4 and DE = 3, find the radius of circle Q.

Infographic Geometry Problem 936: Circle, Semicircle, Diameter, Tangent, Radius, Chord, Metric Relations