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



Order of proofs. 1. Quadrilateral 2. Trapezoid 3. Parallelogram 4. Rectangle/Rhombus 5. Square
Quadrilateral. Shape with four sides.
Parallelogram. 1. Both opposite sides are congruent OR 2. Both opposite sides are parallel OR 3. One pair of opposite sides are congruent and parallel OR 4. Diagonals bisect each other Fact: Opposite angles are congruent.
Rectangle Mandatory: is a parallelogram 1. Diagonals are congruent OR 2. One right angle
Rhombus. Mandatory: is a trapezoid and parallelogram 1. two consecutive sides are congruent OR 2. diagonals are perpendicular Fact: Opposite angles are congruent, diagonals bisect the opposite angles.
Square. Mandatory: is a parallelogram, rectangle, AND a rhombus
Trapezoid. 1. one pair of parallel opposite sides
Isosceles trapezoid. Mandatory: is a trapezoid 1. non parallel sides are congruent Fact: diagonals are congruent
Right trapezoid. Mandatory: is a trapezoid 1. one right angle
Created by: emarciante9