What is a segment, ray, line, or plane that is perpendicular to a segment at its midpoint called?

What is it called when three or more lines, rays, or segments intersect in the same point?

What is an object that is self-similar?

What is the perpendicular segment from a vertex to the opposite side or to the line that contains the opposite side?

What is a transformation that preserves angle measure and results in an image with lengths proportional to the preimage length?

What is the point at which the lines containing the three altitudes of a triangle intersect called?

If two polygons are similar, then the ratio of the lengths of two corresponding side is called . . . ?

What is parallel to side opposite it and half the length of the opposite side of it?