Rigid Transformations
A change that keeps a figure's size and shape.
What is a rigid transformation?
A figure is divided by a line into 2 halves that are mirror images.
What is reflectional symmetry?
A pair of adjacent angles that add up to 180 degrees.
What are supplementary angles?
A line that divides another line in half at a 90 degree angle.
What is a perpendicular bisector?
The initial position of a geometric figure?
What is the Pre-image
Congruent
What is the same?
A shape looks exactly the same when it is turned less than a full turn around a point.
What is rotational symmetry?
A pair of adjacent angles that add up to 90 degrees.
What are complementary angles?
A line segment that has a starting point and a direction and goes on to infinity.
What is a ray?
Conjecture
What is an educated guess?
A rigid transformation that moves along a vector.
What is a translation?
An imaginary line that divides an object into 2 identical halves.
What is a line of symmetry?
A pair of angles are across from each other at the intersection of a pair of intersecting lines.
What are vertical angles
2 lines that move in the same direction and never touch.
What are parallel lines?
A mathematics rule that that is proven to be true.
What is a theorem.
A rigid transforamtion that turns around a point.
What is a rotation?
An object that can be divided into 2 or more identicle pieces.
What is symmetrical?
A pair of angles on opposite sides of a transversal and between a pair of parallel lines.
What are alternate interior angles.
A ray that has as given distance.
What is a vector?
Notation on a geometric figure that shows two measurements are congruent.
What are tick marks?
A transformation that flips over a line like a mirror image.
What s a reflection?
The direction and distance an object is turned around a point.
What is the angle of rotation.
A pair of angles that in the same relative location of lines and a transversal the crosses both lines.
What are corresponding angles?
A line that crosses 2 parallet lines.
What is a transversal?
The Triangle Angle Sum Theorem
What is the proof that the sum of the interior angles of a triangle is always 180 degrees.