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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.
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

Geometry Vocabulary

Unit Review

QuestionAnswer
Ray a part of a line that begins at a particular point (the endpoint) and extends forever in one direction
Line a two-dimensional object that has no endpoints and continues on forever in both directions
line segment part of a line connecting two points, it has definite end points
Angle the figure formed by two rays, called the sides of the angle, sharing a common endpoint (the vertex of the angle)
vertex the point at which the rays of an angle or the sides of a polygon meet; the plural form of the word is “vertexes” or “vertices”
acute angle an angle with a measure less than 90°
obtuse angle an angle with a measure more than 90°
right angle a 90° angle
straight angle a 180° angle
reflex angle an angle with a measure greater than 180° but less than 360°
adjacent angle two angles that are next to each other
congruent sides congruent sides or segments have the exact same length
adjacent sides two sides that share a common vertex
parallel lines lines that never meet; two parallel lines are always the same distance apart
perpendicular two lines that intersect at right angles
regular polygon a polygon in which all sides are the same length and all angles have the same measure
polygon a 2-dimensional figure formed by three or more line segments (sides) that meet only at their endpoints (vertices) to make a closed path; sides may not cross one another
quadrangle a polygon with four sides and four angles
equilateral triangle a triangle with all three sides equal in length, each angle of an equilateral triangle measures 60°
isosceles triangle a triangle with two sides equal in length
scalene triangle a triangle with no sides equal in length
right triangle a triangle with a right angle (90°)
acute triangle a triangle with three acute angles
obtuse triangle a triangle with one obtuse angle
rhombus a rhombus is a quadrilateral whose four sides are congruent; it has two pairs of parallel sides; squares are a type of rhombus with congruent angles
square a figure with four congruent sides and four right angles; a square is always a rhombus; all squares are considered rectangles
rectangle a figure with four sides and four right angles; opposite sides are parallel and congruent, a rectangle is sometimes a trapezoid; a rectangle is sometimes a square
trapezoid a quadrilateral with at least one pair of parallel sides
parallelogram a quadrilateral with two pairs of parallel sides; opposite sides have the same length and opposite angles have the same measure; all rectangles are parallelograms but not all parallelograms are rectangles because parallelograms do not necessarily ha
concave polygon a polygon with an angle measuring more than 180°; concave polygons look like they are collapsed or have one or more angles “dented” in
convex polygon a polygon is convex if there are no “dents” or indentations in it
Created by: hmcarew