|
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.)
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.
|
