Yes, or a lens.
A bisector divides an angle in half (usually in the form of a line passing through the centre of the angle).
It is a bisector.
Median
3?4
symmetry
Symmetry
Yes, or a lens.
It is a line of symmetry.
sagital
Imagine if you cut a mirror shaped like a ball in half. The inside half is the concave mirror, and the outside half is a convex mirror.
The lower quartile divides the lower half into two equal parts.
A bisector divides an angle in half (usually in the form of a line passing through the centre of the angle).
mirror
the equator
The equator divides the earth into the north and south hemispheres.
No. A diameter divides a circle in half. A radius is half the diameter.