SMOPS 2015 No.30 Geometry Addition Reflection Trick

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SMOPS 2015 No.30 Geometry Addition Reflection Trick
Anonymous Christian
Mar 29, 2019
Math Olympiad, Math Olympiad Primary, SMOPS
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Question (in Image below)

(SMOPS 2015 No.30 )
In the following figure, not drawn to scale, B, D, E and C lie on a straight line. Given that angle (BAD) = angle (DAE) = 12 degrees, AC is perpendicular to AD, and BC = AB + AE, find angle (ABC) in degrees.

Solution (Please refer to Image below):

anonymous-christian

Jonathan Ramachandran is founder at AnonymousChristian.org which serves as a Christian Blog discussing the Greater Hope of Biblical Christian in Christ Alone. He is also an IMO (International Math Coach) and a featuring Guitarist for many bands.