rectangle
A square.
A square, a rhombus and a kite
Equilateral triangles have 3 perpendicular bisectors
No, they are just bisectors. The angle between them is not (usually) the 90o required to be perpendicular.
True, the diagonals of a rhombus are perpendicular bisectors of one another.
If the diagonals are congruent and are perpendicular bisectors of each other then the parallelogram is a square. If the diagonals are not congruent but are perpendicular bisectors of each other then the figure would be a rhombus.
all three perpendicular bisectors elongate to meet at the incenter of the triangle.
nope
The perpendicular bisectors only intersect on the triangle when it is an isosceles right triangle.
Yes, a rectangle has perpendicular bisectors for each of its sides. The perpendicular bisector of a side is a line that divides that side into two equal lengths at a right angle. Additionally, the diagonals of the rectangle also serve as perpendicular bisectors of each other, intersecting at the rectangle's center.
equalateral
circumcenter