Geometry Problem 104. Angles, Triangle, Quadrilateral.
Level: High School, Honors Geometry, College,
Mathematics Education
In the figure below, given a
quadrilateral ABCD, angle ABD = 2a
, angle DBC = 90  a
, angle ADB = 2b
, and angle BDC = 90  b
. Prove that angle AEB = 90 + b  a
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