Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
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 associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
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

Plane Geometry 1.1

GWirtz Plane Geometry Carnegie Lesson 1.1

polygon (p5) A two-dimensional figure that is formed by three or more segments called sides. Each side must intersect exactly two other sides, one at each endpoint. No two sides intersect each other more than once.
side (p5) One of any of the line segments that form the polygon.
triangle (p5) A polygon that has three sides.
quadrilateral (p5) A polygon that has four sides.
pentagon (p5) A polygon that has five sides.
octagon (p5) A polygon that has eight sides.
perimeter (p5) The sum of all the side lengths.
area (p5) The number of square units needed to cover the figure.