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23 Cards in this Set
- Front
- Back
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RIGHT ANGLE |
This is an angle that forms a square corner.
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POLYGONS
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A polygon is a simple, closed figure with straight sides. The number of angles is the same as the number of sides.
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SIMILAR
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Figures that have the same shape but are different sizes.
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A POINT |
A point is an exact location in space. |
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ANGLE
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An angle is formed by two rays that start at the same endpoint. They are measured in degrees using a protractor.The rays are the sides of the angle. The endpoint is its vertex.
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SPACE FIGURES
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They are three-dimensional geometric figures. they can have different numbers of flat surfaces called faces, and edges (lines), and vertices (angles).
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FLIP
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An imaginary line acts like a mirror for the figure. The figure is flipped like a page in a book. It can also be flipped to the left or up or down.
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A LINE |
A line is also a straight figure, but it has no endpoints
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CONGRUENT
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These are figures that are the same shape and size
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INTERSECTING LINES |
These are lines that cross each other.
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TURN
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Turn a figure around a point. The point acts like a pin when the figure is turned. The figure is turned around one of its corners.
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LINE SEGMENT |
It is a straight figure with two endpoints. |
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LINE OF SYMMETRY
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The fold line on aplane figure is a line of symmetry.
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A RAY |
A ray is a straight figure. It has one endpoint. It goes on forever in just one direction.
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STRAIGHT ANGLE
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When two right angles are put together, they form a straight angle. It measures exactly 180 degrees.
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PARALLEL LINES |
These are lines in the same plane that never intersect.
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ACUTE ANGLE
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Less than 90 degrees
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A PLANE
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A plane is a flat surface that goes on and on in all directions. Shapes drawn on a plane are called plane figures. Plane figures can be open like an angle or closed like a circle or polygons
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OBTUSE ANGLE
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Greater than 90 degrees but less than 180 degrees.
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A REGULAR POLYGON |
A regular polygon has all sides the same length and all angles the same measure.
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PERPENDICULAR LINES |
These are intersecting lines that form right angles are called perpendicular lines
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SLIDE
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Geometric figures can move in special ways. You can slide a figure across a line. The figure looks the same but is in a different place on the paper.
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SYMMETRIC FIGURE
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A figure that can be folded so that its two parts match exactly.
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