Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Plain Geometry

Points, Angles and Planes

Point An exact location in space.
Line A straight path that extends without end in opposite directions.
Plane A flat surface that extends forever.
Segment The part of a line between two endpoints.
Ray A part of a line that starts at one endpoint and extends forever in one direction.
Angle A figure formed by two rays with a common endpoint called the vertex.
Right Angle An angle that measures 90 degrees.
Acute Angle An angle that measures less than 90 degrees.
Obtuse Angle An angle that measures more than 90 degrees and less than 180 degrees.
Complementary Angles Two angles whose measures add to 90 degrees.
Supplementary Angles Two angles whose measures add to 180 degrees.
Vertical Angles A pair of opposite congruent angles formed by intersecting lines.
Parallel Lines Lines in a plane that do not intersect.
Perpendicular Lines Lines that intersect to form right angles.
Transversal A line that intersects two or more lines.
Created by: jharlor