Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account


An operation that changes one figure into another figure.


A transformation that creates a mirror image of a figure


A transformation that slides a figure


A transformation that stretches or shrinks a figure

Obtuse Triangle

A triangle with one angle greater than 90 degress

Scalene Triangle

A triangle with no congruent sides


A parallelogram with 4 congruent sides


A quadrilateral with both pairs of opposite sides parallel


A closed geometric figure made up of 4 line segments, called sides, that intersect only at their endpoints

Regular Polygon

A polygon with all sides equal in length and all angles equal


A closed figure whose sides are line segments that intersect only at their endpoints


A polygon with 5 sides


A polygon with 8 sides

Congruent Segments

Segments that have the same length

Congruent Angles

Angles that have equal measures


A polygon with seven sides.

Complementary Angles

Two angles whose measures have a sum of 90 degrees.

Line Symmetry

A figure that when cut in half has a mirror image of the other half.


Two lines on the same plane that never intersect.

Equilateral Triangle

A triangle with three congruent sides.

Acute Angle

An angle whose measure is less than 90 degrees.

Right Angle

An angle whose measure is exactly 90 degrees.


A quadrilateral with exactly one pair of parallel sides.

Isosceles Triangle

A triangle with at least two congruent sides.

Perpendicular Lines

Two lines that intersect to form a right angle.

Straight Angle

An angle whose measure is exactly 180 degrees.

Supplementary Angles

Two angles whose measures have a sum of 180 degrees.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording