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

Geometry

Postulates and Theorems for Ch. 4

QuestionAnswer
Triangle Sum Theorem the sum of the measures of the interior angles of a triangle is 180 degrees
Exterior Angle Theorem The measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent interior angles
Corollary to triangle sum theorem The acute angles of a right triangle are complementary
Third Angle Theorem If two angles of one triangle are congruent to two angles of another triangle, then the third angles are congruent.
Base Angles Theorem If two sides of a triangle are congruent, then the angles opposite them are congruent
Converse of the Base Angles Theorem If two angles of a triangle are congruent, then the sides opposite them are congruent.
Side-Side-Side Congruence Postulate (SSS) If three sides of one triangle are congruent to three sides of a second triangle, then the two triangles are congruent
Side-Angle-Side Congruence Postulate (SAS) If two sides and the included angle of one triangle are congruent to two sides and the included angle of a second triangle, then the two triangles are congruent
Hypotenuse-Leg (HL) Congruence Theorem If the hypotenuse and a leg of a triangle are congruent to the hypotenuse and a leg of a second triangle, then the two triangles are congruent.
Angle-Side-Angle Congruence Postulate (ASA) If two angles and the included side of one triangle are congruent to two angles and the included side of a second triangle, then the two triangles are congruent
Angle-Angle-Side Congruence Postulate (AAS) If two angles and a nonincluded side of one triangle are congruent to two angles and a nonincluded side of a second triangle, then the two triangles are congruent
Created by: 12tsherman