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19 Cards in this Set
- Front
- Back
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Trapezoid |
A trapezoid is a 4-sided flat shape with straight sides that has a pair of opposite sides parallel. Called an Isosceles trapezoid when the sides that aren't parallel are equal in length and both angles coming from a parallel side are equal. |
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Rectangle |
a rectangle is any quadrilateral with four right angles. It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°). It can also be defined as a parallelogram containing a right angle. |
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Square |
A square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or right angles).
It can also be defined as a rectangle in which two adjacent sides have equal length. |
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Complementary |
Two angles are Complementary when they |
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Supplementary |
Two Angles are Supplementary when they add up to 180 degrees. They don't have to be next to each other, just so long as the total is 180 degrees. |
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Vertical |
Vertical Angles are the angles opposite each other when two lines cross. They are always equal. They are at right angles to a horizontal plane; in a direction, or having an alignment, such that the top is directly above the bottom. |
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Congruent |
Two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other. |
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Similar |
Two geometrical objects are called similar if they both have the same proportional shape, or one has the same shape as the mirror image of the other. |
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Hexagon |
A hexagon (from Greek ἕξ hex, "six" and γωνία, gonía, "corner, angle") is a polygon with six edges and six vertices. The total of the internal angles of any hexagon is 720°. |
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Parallel Lines |
Parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch at any point are said to be parallel. |
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Straight |
Extending or moving uniformly in one direction only; without a curve or bend. |
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Right |
A 90º angle is called a right angle. A triangle with one 90º angle is called a right triangle. |
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Adjacent |
Having a common vertex and a common side. |
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Diagonal |
A diagonal is a line segment joining two nonconsecutive vertices of a polygon or polyhedron. Informally, any sloping line is called diagonal. |
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Ray |
A line which starts at a point with given coordinates, and goes off in a particular direction to infinity, possibly through a second point. |
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Vertex |
A vertex (plural vertices) is a special kind of point that describes the corners or intersections of geometric shapes.
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Rhombus |
A Rhombus is a flat shape with 4 equal straight sides. Opposite sides are parallel, and opposite angles are equal (it is a Parallelogram). And the diagonals "p" and "q" of a rhombus bisect each other at right angles. |
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Isosceles Triangle |
A triangle with two equal sides. |
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Perpendicular Lines |
Lines that are at right angles (90°) to each other. |
