Pairs of Angles
A pair of adjacent angles whose non-common sides are opposite rays; a pair of angles that form a straight line
What is a linear pair?
Two or more lines that never intersect
What are parallel lines?
A line of reflection that "folds" the figure into two halves that match exactly
What is a line of symmetry?
A location in space
What is a point?
Two noncollinear rays with a common endpoint
What is an angle?
A pair of angles whose sum is 90 degrees
What are complementary angles?
A line that intersects two or more parallel lines
What is a transversal?
A transformation that is represented by "flipping" the initial figure
What is a reflection?
A set of points that continues indefinitely in two opposite directions
What is a line?
What is the vertex?
A pair of angles whose sum is 180 degrees
What are supplementary angles?
A pair of angles that lie between parallel lines and on opposite sides of the transversal
What are alternate interior angles?
A transformation represented by "sliding" the initial figure
What is a translation?
A portion of a line with one endpoint
What is a ray?
What are acute and obtuse angles?
A pair of angles that share a common ray and vertex; a pair of angles that are "next to" each other
What are adjacent angles?
A pair of angles that lie in the same "position" or "location" when a transversal intersects parallel lines
What are corresponding angles?
A transformation represented by "turning" an initial figure
What is a rotation?
A portion of a line with two endpoints
What is a line segment?
An angle whose measure is 180 degrees
What is a straight angle?
A pair of angles that share a vertex and are "across from" or "opposite" each other
What are vertical angles?
A pair of angles that lie between parallel lines and are on the "same side" of the transversal
What are consecutive interior angles?
A transformation that changes the size of the initial figure using a scale factor
What is a dilation?
What is a plane?
The angle formed by perpendicular lines; it measures exactly 90 degrees
What is a right angle?