Acute

an angle less than 90 degrees

Obtuse

of an angle, between 90 and 180 degrees

Adjacent

Next to

Vertical

Across from each other

Complementary

sum of angles that equals 90 degrees

Supplementary

sum of angles that equals 180 degrees

Congruent

Having the same size and shape

Right Angles

an angle whose measure equals 90

Straight Angles

measures exactly 180 degrees and forms a straight line

Corresponding

a pair of angles that are on the same side of the transversal, one interior ,and one exterior, and not adjacent

Translation

sliding a figure from one position to another without turning or flipping the figure

Ray

a straight line extending from a point

Alternate Interior

angles which are on opposite sides of the transversal and inside of the parallel lines

Alternate Exterior

located outside the parallel lines and opposite sides of the transversal

Reflect

To move to a different spot but same way

Rotation

To rotate something to the left or right

Transformation

To rotate, reflect, or translate