Go Geometry Problems

Online Geometry Problem 2, Art 01. Triangle, Angles, Auxiliary Lines, 20-80 Degrees. PicSketch for iPad

Prove the following: if, in a triangle ABC, angle BAO = angle OAC = 20, angle ACO = 10,and angle OCB = 30, then angle OBC = 80. Try to use elementary geometry (Euclid's Elements.) 

Geometry problem 2 Art 01, iPad app PicSketch Artwork, Triangle problem about triangle, angles

See also: Art 00


PicSketch - Pencil Sketch & Drawing Photo Filter Effects
PicSketch by Softease Tech Co., Limited is a photo sketch app for iPhone and iPad, to turn photo into a pencil sketch artwork in a few taps.




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