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

Circles Lines Angles

Ray A part of a line that has one endpoint and extends without end in one direction.
Angle A figure formed by two rays or line segments with a common endpoint.
Line A straight path that goes on forever in opposite directions.
Perpendicular Lines, line segments, or rays are perpendicular if they form right angles.
Parallel The same distance apart at every point.
Oblique Lines that are not parallel or perpendicular.
Intersect To cut or divide by passing through or across.
Protractor A tool used to measure angles.
Degree A Unit of measuring angles.Also a unit for measuring angles.
Right Angle An angle that measures 90 degrees.
Straight Angle An angle of 180 degrees.
Sumpplementary Angles Angles having a sum of 108 degrees.
Complementary Angles Angles having a sum of 90 degrees.
Opposite Angle When two angles intersect.
Vertical Angle Pairs of opposite angles formed by intersecting lines.
Opposite Angles When two lines intersect.
Vertical Angle Pairs of opposite angles formed by intersecting lines.
Polygon A closed plane figure with sides made of straight line segments.
Congruent Exactly the same size and shape.
Isosceles Triangle A triangle with at least two congruent sides.
Equilateral Having all equal sides.
Scalene Triangle A triangle with no equal sides.
Acute Triangle A triangle with three acute angles.
Obtuse Triangle A triangle with one obtuse angle.
Right Triangle A triangle with one right angle.
Right Trapezoid A trapezoid with at least one right angle.
Circle A plane figure that forms a closed path so that all the points on the path are the same distance from a point called the center.
Reflex Angle An angle greater than 180.
Created by: 10025217