Save
Busy. Please wait.
Log in with Clever
or

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

taken

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.
focusNode
Didn't know it?
click below

Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
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 Unit Vocab

### For Zoe; Tutoring Session

TermDefinition
Acute Angle An angle that measures less than 90 degrees
Acute Triangle A triangle that has all angels less than 90 degrees
Adjacent Angles Two angles that have a common vertex and don't overlap
Decagon A polygon with 10 sides
Degree A measure for angles. There are 360 degrees in a full rotation. The symbol for degrees is °.
Endpoint The two furthest points on a line segment
Equilateral Triangle A triangle with all three sides of equal length. All of the angles in it measure 60°
Hexagon A polygon with 6 sides
Intersecting Lines Lines that cross over and have a common point
Isosceles Triangle A triangle with two equal sides. The angles opposite of the equal sides are equal
Line Straight, has no thickness, and extends in both directions without end
Line of Symmetry A line where you could fold a shape and have both sides match exactly
Line Segment The part of a line that connects two points
Obtuse Angle More than 90° but less than 180°
Obtuse Triangle A triangle that has one angle greater than 90°
Octagon A polygon with 8 sides
Parallel Lines Lines that never meet. They are the same distance apart
Parallelogram A quadrilateral where opposite sides are parallel
Pentagon A polygon with 5 sides
Perpendicular Lines lines that are at right angle to each other
Point An exact location. It has no size, only location
Protractor A measuring tool used to measure or draw angles
Quadrilateral A two-dimensional shape with four straight sides
Ray A part of a line with a start point but no end point
Rectangle A two-dimensional shape with straight sides where all inside angles are right angles
Rhombus A two-dimensional shape with 4 straight sides that are all equal length. It's a type of parallelogram
Right Angle Equal to 90° and is one quarter of a full rotation
Right Triangle A triangle that has one right angle
Scalene Triangle A triangle with all sides of different lengths. No sides or angles are equal
Square A quadrilateral where all sides have equal length and every angle measures 90°
Symmetry When two or more parts are identical after a flip, slide, or turn
Trapezoid A quadrilateral that has one pair of opposite sides parallel
Vertex A point where two or more line segments meet. It can also be referred to as a corner
Vertices the plural form of vertex
Created by: 1L
Popular Math sets

Voices

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:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

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: Retries:
restart all cards