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# Geometry Puzzle Project

Across
The point on a line segment that divides the segment into two congruent segments. Ex. A line with a point in the middle.
A result that has been proved to be true (using facts that were already known). Ex. The Pythagorean ...
A mathematical statement that appears to be true, but has not been proven yet. Ex. "I believe that this is true, but I have no proof yet."
Two angles that add up to 180 degrees.
Lines that cross exactly at one point. Ex. +
A line that cuts a line segment into two equal parts at 90 degrees.
Used to determine the distance two points. Ex. (AB)2 = (x2 - x1)2 + (y2 - y1)2
A quadrilateral that has both pairs of opposite sides parallel to each other.
Two lines in a plane that does not intersect or touch each other at any point. Ex. //
A line or ray that that divides an angle into two congruent angles.
An angle that is less than 90 degrees.
A statement that is taken to be true without proof. Ex. Also known as an axiom.
The intersection of the three medians of the triangle (each of them connecting a vertex with the midpoint of the opposite side).
Down
A polygon with five straight sides and five angles.
Geometric objects that only have one location. Ex. We use coordinates to locate them.
A flat shape with four sides.
Two angles that add up to 90 degrees.
A triangle that has two sides that are equal lengths.
The angles opposite each other when two lines cross.
Figures that have the same shape and same size.