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

Postulates -Theorems

Geometry postulates and theorems

Postulate 5 Through any two points there exists exactly one line
Postulate 6 Through any three noncollinear points there exists exactly one plane
Theorem 4-1 If two lines intersect, then they intersect at exactly one point
Theorem 4-2 If there is a line and a point not on the line, then exactly one plane contains them
Theorem 4-3 If two lines intersect, then there exists exactly one plane that contains them
Postulate 7 If two planes intersect, then their intersection is a line.
Postulate 8 If two points lie on a plane, then the line containing them lies in the plane
Postulate 9 A line contains at least 2 points. A plane contains at least three noncollinear points. Space contains at least 4 noncoplanar points
Theorem 5-2 If two lines in a plane are perpendicular to the same line, then they are parallel to each other
Theorem 5-3 In a plane, if a line is perpendicular to one of two parallel lines, then it is perpendicular to the other one.
Theorem 5-1 If two parallel planes are intersected by a third plane,then the lines of intersection are parallel
Theorem 5-4 If two lines are perpendicular, then they form congruent adjacent angles
Theorem 5-5 If two lines form congruent adjacent angles, then they are perpendicular
Theorem 5-6 All right angles are congruent
Postulate 10: The Parallel Postulate Through a point not on a line, there exists exactly one line through the point that is parallel to the line
Theorem 5-7: Transitive Property of Parallel Lines If two lines are parallel to the same line, then they are parallel to one another
Created by: ojw1230