Geometry Problem 1341: Isosceles Triangle, 80-20-80 Degrees, Circumcenter, Angle Bisector

In an isosceles triangle ABC (AB = BC), the measure of angle B is 20 degrees, O is the circumcenter and AD is the bisector of the angle A (D is on BC). Find the measure of the angle BDO.

Geometry Problem 1341: Isosceles Triangle, 80-20-80 Degrees, Circumcenter, Angle Bisector
See also: Hyperbolic Kaleidoscope

Hyperbolic Kaleidoscope of Problem 1341 on Instagram:


#Geometric Art of Problem 1341: #Isosceles Triangle, 80-20-80 Degrees, #Hyperbolic Kaleidoscope, #iPad Apps #Geometry Details: http://www.gogeometry.com/school-college/4/p1341-ipad-hyperbolic-kaleidoscope-isosceles-sw.htm

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Problem 1341 on Twitter: