geometry crossword puzzle

each of the pairs of opposite angles made by two intersecting lines.
two lines that are always the same distance apart and never touch
the relationship between two lines which meet at a right angle.
something that cuts an object into two equal parts.
is a angle greater than 90 but less than 180 degrees
a plane figure with three straight sides and three angles.
intersecting a system of lines.
the action of rotating around an axis or center.
half of the diameter
a triangle with a square in it
the middle point of a circle or sphere, equidistant from every point on the circumference or surface.
The distance around a two-dimensional shape.
a way of writing down very large or very small numbers easily.
a round solid figure, or its surface, with every point on its surface equidistant from its center.
two lines that share exactly one point.
usually to an element of some set called a space.
the space occupied by a flat shape or the surface of an object.
a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
each of the parts into which something is or may be divided.
the action or condition of becoming or being made wider, larger, or more open.