Equilateral triangles have 3 perpendicular bisectors
3
It's the circumcenter.
They are not. The perpendicular bisectors of a triangle, for example, intersect at the orthocentre of the triangle. So perpendicular lines can be intersecting and conversely.
Yes.
Right triangles have a set of perpendicular lines and no parallel lines.
one
It is only applicable to a right angle triangle where the perpendicular lines meet at 90 degrees
Yes. They have perpendicular bisectors in the four triangles that make up four of the five sides of a square-based pyramid
Triangles do not have parallel lines but as right angles triangles they do have perpendicular lines that meet at 90 degrees.
Perpendicular. Bt ONLY right triangles contain perpendicular lines.
They are the lines joining each of the vertices to the mid-points of the opposite sides. In an equilateral triangle, these lines are the medians, angle bisectors, altitudes and perpendicular bisectors of the sides - all in one!