Geometry Crossword

An angle with measure between 0 and 90.
The ray that divides the angle into two congruent adjacent angles.
A statement that can be proved.
An example used to prove that an if-then statement is false. For that counterexample, the hypothesis is true and the conclusion is false.
A statement that contains the words "if and only if."
Two lines that intersect to form right angles.
Lines that are not coplanar.
A line that intersects two or more coplanar lines in different points.
The figure formed by three segments joining three noncollinear points. Each of the three points is a vertex of the triangle and the segments are the sides.
A segment joining two non-consecutive vertices of a polygon.
The set of points in a plane that are a given distance from a given point in the plane. The given point is the center, and the given distance is the radius.
A chord that contains the center of a circle.
A segment whose end points lie on a circle.
Circles that lie in the same plane and have the same center.
An 8-sided polygon.
A 4-sided polygon.
A quadrilateral with both pairs of opposite sides parallel.