Math Infographic, 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.

See solution below

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

A post shared by Antonio Gutierrez (@gogeometry1) on Aug 10, 2017 at 1:08pm PDT

Problem 1341 on Twitter:

#Euclidean #Geometry Problem 1341: #Isosceles #Triangle 80-20-80 Degrees, #Circumcenter Angle #Bisector https://t.co/MZ1MSJHXxz pic.twitter.com/UCeNiyQCye

— Antonio Gutierrez (@gogeometry) August 10, 2017

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