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

Sign up for an account

Already have a Quizlet account? .

Create an account


a location on a plane or in space


The set of all points on a plane in a single path that continues in opposite directions


The set of al points on a flat surface that extends in all directions

Line segment

Part of a line; Named by two endpoints.


The set of all points in a single path beginning at an endpoint and continuing in one direction


The joining of two rays to a common endpoint


Endpoint of the angle


An angle that measures between 0 and 90 degrees


An angle that measures 90 degrees


An angle that measures between 90 and 180 degrees


An angle that measures 180 degrees


An angle that measures more than 180 degrees


Two angles whose measures add up to 90 degrees are ____________.


Two angles whose measures add up to 180 degrees are _________.


Angles that are nonadjacent that are formed when two lines intersect are __________ angles.


Two lines on the same plane that will never intersect are __________ lines.


_________ angles are formed when a transversal cuts two or more other lines; They are on the same side of the transversal on the same side of the parallel line that forms each angle.

Alternate interior

Formed when a transversal cuts two or more lines; Opposite sides of the transversal, but on the einterior of the parallel lines.

Alternate Exterior

Opposite sides of the transversal on the exterior


lines that meet to form right angles are _________.


A triangle whose sides are each different lengths


A triangle in which two sides have the same measure


A triangle that has three congruent sides


a triangle with three acute angles


A triangle with one obtuse angle and two acute angles


A triangle that contains one right angle and two acute angles. The two acute angles are complimentary.

Isosceles right

A triangle with two congruent sides, a right angle, and two acute angles that are equal in measure.

Scalene right

A triangle that contains sides each with different lengths, a right angle, and two acute angles that are complimentary, but not necessarily congruent.

Isosceles obtuse

A triangle that has two congruent sides, an obtuse angle, and two congruent acute angles.

Isosceles acute

A triangle that has two congruent sides and each of the angles is acute. The two acute base angles are congruent.

Similar figures

Figures that have the same shape, but not necessarily the same size


Triangles that have corresponding sides, or sides that line up, that are in proportion to each other are ________ triangles.

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