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

Chapter 8-5th Grade


point An exact location in space.
line A straight path of points that goes on forever in two directions.
plane An endless flat surface.
line segment A part of a line with two endpoints.
ray Part of a line that has one endpoint and extends forever in one direction.
parallel lines In a plane, lines that never cross and stay the same distance apart.
intersecting lines Lines that pass through the same point.
perpendicular lines Intersecting lines that intersect to form square corners or right angles.
angle Two rays that have the same endpoint.
Vertex The common endpoint of the two rays in an angle.
degree (°) A unit of measure for angles.
protractor An instrument used to measure and draw angles.
right angle An angle whose measure is 90°.
acute angle An angle whose measure is between 0° and 90°.
straight angle An angle measuring 180°.
obtuse angle An angle whose measure is between 90° and 180°.
regular polygon A polygon that has sides of equal length and angles of equal measure.
polygon A closed plane fi gure made up of line segments.
quadrilateral A polygon with 4 sides.
triangle A polygon with 3 sides.
hexagon A polygon with 6 sides.
pentagon A polygon with 5 sides.
equilateral triangle A triangle whose sides all have the same length.
octagon A polygon with 8 sides.
Created by: rhondacarlton