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

7th Geometry

Angles, Triangles

Ray A part of a line that has one fixed end point and extends infinitely along the line from the end point.
Angle A figure formed by two rays.
Vertex A point where two or more lines come together.
Acute angle An angle less than 90 degrees
Right angle An angle equal to 90 degrees
Obtuse angle An angle greater than 90 degrees but less than 180 degrees
Straight angle An angle that equals 180 degrees
Supplementary angle Two angles that total 180 degrees.
Complementary angle Two angles that total 90 degrees.
Adjacent angles Two angles that share the same vertex, but do not have any other relationship.
Vertical angles A pair of angles opposite intersection lines. Vertical angles are equal to each other.
Equilateral triangle A triangle that has ALL sides the same length
Isosceles triangle A triangle that has EXACTLY two sides equal.
Scalene triangle A triangle in which ALL sides are NOT the same
Acute triangle A triangle with all three angles that are less than 90 degrees
Right triangle A triangle with a 90 degree angle
Obtuse triangle A triangle that has one angle more than 90 degrees
Created by: MsHarkness