None - the edge is curved so no straight sections to make angles
Two.
45 degree and a 90 degree angles
It is to bisect an angle into equal angles usually done with a pair of compasses and a straight edge
Any angle can be bisected using a compass and a straight edge.
No. Left aligned has a straight leftedge, Right aligned has a straight right edge, Justified has both left and right edges straight.
Anything that has a straight (180 degree) edge. Like a computer screen has 4 straight angles. Or the margin on a piece of paper, that's a straight angle too.
A perpendicular edge is a side of a plane shape that is at right angles (90 degrees) to another edge.
No. But there are straight edge "groups" that are a lot like gangs. But no, straight edge itself is not a gang, and a straight edge person is not a gang member.
A straight edge is used for making perfectly straight lines when drawing. The straight edge is placed on the paper and you use the edge to draw against.
Infinitely many. At any of the infinitely many points along any edge, the angle between the two faces meeting at that edge is a right angle.
A straight edge