Not sure what an "irie" is. But a bisector does not need to be perpendicular.
true
Not always because the diagonals of a rectangle bisect each other but they are not perpendicular to each other.
Not always because a perpendicular bisector can be constructed with compasses
No.
By definition, a segment bisector always created two congruent segments.
thank goodness for my math teacher, norm! he said only in an isosceles triangle. The bisector of the vertex angle of an isosceles triangle is perpendicular to the base! =)
iscoceles triangle! =)
any isosceles triangle
always
yes
12
The diagonals of a square are always perpendicular.