Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why

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.

Remove ads
Don't know
Know
remaining cards
Save
0:01
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:
Retries:
restart all cards




share
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

Formulas & Theorems

FINAL

TermDefinition
quadrilateral a four sided figure
diagonal segment joining any two nonconsecutive vertices in a quadrilateral
parallelogram special kind of quadrilateral in which both pairs of opposite sides are parallel
opposite sides of a parallelogram are congruent
opposite angles of a parallelogram are congruent
consecutive angles in a parallelogram are supplementary
diagonals of a parallelogram bisect each other
quadrilateral is parallelogram if #1 both pairs of opposite sides are parallel
quadrilateral is parallelogram if #2 both pairs of opposite sides are congruent
quadrilateral is parallelogram if #3 pair of opposite sides are both parallel and congruent
quadrilateral is parallelogram if #4 diagonals bisect each other
quadrilateral is parallelogram if #5 both pairs of opposite angles are congruent
rectangle quadrilateral with four right angles
rectangle property that make is a parallelogram #1 opposite sides are congruent
rectangle property that make is a parallelogram #2 opposite angles are congruent
rectangle property that make is a parallelogram #3 consecutive angles are supplementary
rectangle property #1 all four angles are right angles
rectangle property #2 diagonals are congruent
rhombus quadrilateral with four congruent sides
square quadrilateral with four right angles and four congruent sides
diagonals of a rhombus are perpendicular
each diagonal of a rhombus bisects a pair of opposite angles
trapezoid quadrilateral with exactly one pair of parallel sides
parallel sides of trapezoids are called bases
nonparallel sides of trapezoids are called legs
isosceles trapezoid trapezoids legs are congruent
segment that joins the midpoints of the legs of the trapezoid is called median
both pairs of base angles of an isosceles trapezoid are congruent
diagonals of an isosceles trapezoid are congruent
median of a trapezoid is parallel to bases
median formula for trapezoids one half the sum of the measures of the bases
Created by: 2018grellerj