coplanar angle that have a common vertex and one common side, but no common interior points - next to each other!
two non-adjacent angles formed by two intersecting lines - across from each other!
two adjacent angles whose non-common sides are two rays going in opposite directions - two angles that make a line!
Sum of the measures of the two angles is 90 degrees.
Sum of the measures of the two angles is 180 degrees. If two angles form a linear pair, they are supplementary.
A set of point all lined on the same line.
A set of points or lines all lying on the same plane.
Non-Coplanar lines that never intersect.
Coplanar lines that never intersect.
Lines that intersect to form right angles.
A portion of a line with two end points.
Portion of a line with one end point.
A segment, line or ray that divides a segment into two congruent halves.
A line or ray that divides an angle in half.
the point where a graph intersects the y-axis.
the steepness of a line; constant rate of change;change in y over change in x.
an "If, then" statement' the part after "if" is the hypothesis and the part after "then" is the conclusion.
switching the hypothesis and conclusion of a conditional statement.
negating the hypothesis and conclusion of a conditional statement.
Switching and negating the hypothesis and conclusion of a conditional statement.
an undefined term; has no length, with, or thickness(no dimensions); and represents a location in space.
an undefined term; has no width or thickness (one dimension - length); continues forever in two directions.
an undefined term; has no thickness (two dimensions - length & width); continues forever in all directions; a flat surface.
a statement that is proven.
a statement that is accepted as true without proof.
something that proves a statement false.
two adjacent angles whose non-common sides are two rays going in opposite directions-two angles that make a line.
center of dilation
In a dilation, the fixed point about which the figure is enlarged or reduced. It's also the intersection point of the lines that extend through the corresponding vertices of the original and dilated image.
the figure before the transformation is applied.
the figure after the transformation is applied, indicated by primes - A'B'C'
the ratio used to enlarge or reduce similar figures.
figures that are the same size and same shape - angles and side lengths are all congruent.
figures that are the same shape but different size - angles are congruent and sides are proportional.
transformations in which the pre-image and image are congruent figures: rotations, translations, reflections.