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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

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

Geometry Vocab

3rd Grade Geometry Vocab

2- Dimensional Figure The outline of a shape
Square A plane shape that has 4 equal sides
Rectangle A quadrilateral with 4 right angles. Opposite sides are equal length and parallel
Quadrilateral A shape that has 4 sides and 4 angles
Rhombus A parallelogram with 4 sides of the same size
Rhombi One Rhombus
Trapezoid A quadrilateral with exactly one pair of parallel sides.
Vertices The point where 2 rays meet and make an angle
Acute Angle an angle less than 90 degrees
Right Angle an angle that is exactly 90 degrees
Obtuse Angle an angle that is more than 90 degrees
Hexagon a polygon with 6 sides and 6 angles
Octagon - a polygon with 8 sides and 8 angles
Pentagon a polygon with 5 sides and 5 angles
Triangle a polygon with 3 sides and 3 angles
Attributes the characteristic of a shape
Closed Figure a shape that has all sides touching and no sides open
Parallelogram a quadrilateral that has both pairs of opposite sides parallel and equal in length
Polygon A closed 2-D figure formed of 3 or more straight sides that don’t cross.
Congruent the same size as another
Parallel The same distance apart from another. They will never cross.
Created by: mshembree