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The fixed point that a figure rotates around is called the _____ of rotation.
When folded on the line of __________, points of the pre-image coincide with points of the image.
Divides a segment into 2 congruent segments.
Angles in the same position when parallel lines are cut by a transversal.
Perpendicular lines form _______ angles.
Center of the circumscribed circle.
Motions that preserve lengths of segments and angle measures.
Angles that add up to 90 degrees.
An orthocenter is formed by _________.
A set of points that goes on forever.
When 3 or more lines intersect at the same point they are _________.
A figure that has undergone a transformation.
"Mirror image".
Has magnitude (size) and direction.
2 lines that never intersect.
Alternate interior angles are _______.
"Turn"- Moves a figure around the center of rotation.
________- leg is the congruence theorem that can only be used with right triangles.
Property that states that something is congruent to itself.
A line segment from a vertex perpendicular to the opposite side.
Point of concurrency formed by the intersection of medians.
Angles that add up to 180 degrees.
Angle that is less than 90 degrees.
What allows you to say: If a=b and b=c then a=c.
"Slide"- Moves a figure along a given vector.
A figure that is about to undergo a transformation.
Point of concurrency that is equidistant from the sides of a triangle.
Pair of 2 adjacent angles whose sum is 180 degrees.
Intersects a segment at its midpoint and divides it into 2 congruent segments.
Congruent opposite angles formed by intersecting lines.