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

000 DHS Geometry 1-2

Anderson Ch 1-2: Definitions IFF form

QuestionAnswer
midpoint A point is the midpoint of a segment IF AND ONLY IF it cuts the segment into 2 congruent segments.
perpendicular lines Two lines are perpendicular IF AND ONLY IF they form a right angle.
angle bisector A ray is an angle bisector IF AND ONLY IF it cuts the angle into 2 congruent angles.
congruent angles Two angles are congruent IF AND ONLY IF they have equal measures.
congruent segments Two segments are congruent IF AND ONLY IF they have equal measures.
segment bisector A point, line or ray is a segment bisector IF AND ONLY IF it intersects the segment at its midpoint.
acute angle An angle is an acute angle IF AND ONLY IF its measure is between 0 and 90 (0<m<90).
right angle An angle is a right angle IF AND ONLY IF its measure is 90.
obtuse angle An angle is an obtuse angle IF AND ONLY IF its measure is between 90 and 180 (90<m<180).
complementary angles Two angles are complementary angles IF AND ONLY IF the sum of their measures is 90.
supplementary angles Two angles are supplementary angles IF AND ONLY IF the sum of their measures is 180.
adjacent angles Two angles are adjacent angles IF AND ONLY IF they share a common vertex and side, but have no common interior points.
linear pair Two angles are a linear pair IF AND ONLY IF their non-common sides are opposite rays.
vertical angles Two angles are vertical angles IF AND ONLY IF their sides form two pairs of opposite rays and they are not adjacent.
hypothesis The "if" part of an If...then... statement.
conclusion The "then" part of an If...then... statement.
conditional statement If p, then q.
converse of If p, then q. If q, then p.
inverse of If p, then q. If not p, then not q.
contrapositive of If p, then q. If not q, then not p.
biconditional statement A statement that contains IF AND ONLY IF and represents a conditional statement and its converse.
postulate A statement that is accepted without proof.
theorem A statement that can be proven.
counterexample A specific case for which the conjecture is false.
conjecture An unproven statement that is based on observations.
inductive reasoning Reasoning using observed patterns to form a conjecture.
deductive reasoning Reasoning using facts, definitions, and properties to form a logical argument.
Created by: dekalbmath