Save or or taken 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.

focusNode
Didn't know it?
click below

Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
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

### postulates and theorems relating to quadrilaterals (chp. 8)

hypothesisconclusion
If a convex polygon has n sides and S is the sum of the measures of its interior angles then S=180(n-2)
If a polygon is convex then the sum of the measures of th exterior angles, one at each vertex, is 360
Opposite sides of a parallelogram are congruent
Opposite angles of a parallelogram are congruent
Consecutive angles in a parallelogram are supplementary
If a parallelogram has one right angle it has four right angles
The diagonals of a parallelogram bisect each other
The diagonal of a parallelogram seperates the parallelogram into two congruent triangles
If both pairs of opposite sides of a quadrilateral are congruent then the quaderlateral is a parallelogram
If both pairs oppposite angles of a quadrilateral are congruent then the quadrilateral is a parallelogram
If the diagonals of a quadrilateral bisect each other then the quadrilateral is a parallelogram
If one pair of opposite sides of a quadrilateral is both parallel and congruent then the quadrilateral is a parallelogram
If a parallelogram is a rectangle then the diagonals are congruent
If the diagonals of a parallelogram are congruent then the parallelogram is a rectangle
The diagonals of a rhombus are perpendicular
If the diagonals of a parallelogram are perpendicular then the parallelogram is a rhombus
Each diagonal of a rhombus bisects a pair of opposite angles
Both pairs of base angles of an isosceles trapeziod are congruent
The diagonals of an isosceles trapeziod are congruent
The median of a trapezoid is parallel to the bases, and its measure is one-half the sum of the measures of the bases
Created by: m.meyer

Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
 "Know" box contains: Time elapsed: Retries:
restart all cards