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28 Cards in this Set
- Front
- Back
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Line |
A straight path that goes in both directions without end. |
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Line Segment |
A straight path that has two definite endpoints. It is part of a line. |
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Endpoints |
The point at the end of a line segment or ray. |
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Angle |
An angle is formed where two lines or line segments meet. |
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Right Angle |
An angle that makes a square corner. It measures 90 degrees. |
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Acute Angle |
An angle that is less than a right angle. It measures less than 90 degrees. |
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Obtuse Angle |
An angle that is greater than a right angle. It measures more than 90 degrees. |
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Plane Figures |
Flat, closed figures (such as squares, rectangles, triangles, circles, etc.). |
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Closed Figures |
A figure that has the same beginning and ending point. |
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Polygons |
Closed figures that have straight sides. |
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Open Figures |
A figure that has different beginning and ending points. |
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Symmetrical |
A figure that can be folded so that the two halves match. |
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Line of Symmetry |
A line that divides a figure into two matching halves. |
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Parallel |
Lines in a plane that are going in exactly the same direction. |
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Intersecting Lines |
Lines that cross each other at some point. |
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Congruent |
Having the same size and the same shape. |
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Grid |
A large square or rectangular area divided into smaller squares of equal size. |
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Ordered Pair |
Two numbers that locate a specific point on a grid. The first number tells how many spaces to go to the right; the second number tells how many spaces to go up. (12,5) is an ordered pair. |
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Slide |
When a figure is moved in a straight line. |
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Flip |
When a figure is flipped or turned over. |
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Turn |
When a figure is rotated around a point. |
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Solid Figures |
Geometric figures (cones, cubes, pyramids, etc.) that have length, width, and depth and take up space. |
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Face |
A flat surface of a solid figure. |
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Edge |
A line segment where two faces meet. |
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Corner |
A point where two edges meet. |
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Subtraction |
Finding the difference between the whole and a part. |
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Graph |
A drawing that shows and compares information. |
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Table |
An arrangement of information in rows and columns. |
