Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

Username is available taken
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.
Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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

Chapter One

Lines, Line Segment, Ray, Angles

Line Segment measurable piece of a line with 2 distinct endpoints
Distance Formula the distance between two points A (x1,y1) and B (x2, y2)
Congruent having the same size AND the same shape
Congruent Segments If segments are congruent, they are also equal
Bisect to cut in half. A midpoint bisects a segment and gives 2 congruent parts
Midpoint Formula xm= x1 + x2/2 and y1 + y2/2. This gives the midpoint values when you are given two other points on a line segment
Ray a part of a line with exactly one endpoint. It goes indefinitely long in one direction. Remember in naming a ray that order matters!!
Angle 2 rays with a common end point.
Naming a Ray Always start with the endpoint!!
Naming an Angle Always put the vertex in the middle of the angle name
Right Angle an angle which has a measure of 90 degrees
acute angle an angle which has a measure less than 90 degrees
obtuse angle an angle which has a measure more than 90 degrees
straight angle an angle which has a measure of 180 degrees
angle bisector a ray that divides an angle
Adjacent Angles adjacent angles are next to each other and share a ray.
Vertical Angles two non adjacent angles formed by 2 intersecting lines
Complementary Angles their measure add to be 90 degrees
Supplementary Angles their measure add to a total of 180 degrees
Perpendicular to prove something is perpendicular, you need to prove that it is 90 degrees.
Adjacent Supplementary Angles same as a linear pair.
Created by: amgeometry
Popular Math sets




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:

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:
restart all cards