Problem 310: Circle Inscribed in a Semicircle, 45 Degrees Angle.
Level: High School, SAT Prep, College geometry. In the figure below, circle C is inscribed in a semicircle with
diameter AB. If D and E are the tangency points, prove that the measure
of angle AED is 45 degrees.
Sketch and Typography of
Problem 310
In the figure below, circle C is inscribed in a semicircle with
diameter AB. If D and E are the tangency points, prove that the measure
of angle AED is 45 degrees.

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