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38 Cards in this Set
- Front
- Back
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Point |
A location in space
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line |
a series of points that extends in two opposite directions |
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line segment |
consists of two endpoints and all the points on the line between the endpoints |
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Ray |
Consists of one endpoint and all the points on the line on one side of the endpoint |
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Plane |
A flat surface with no thickness that extends in all directions on the surface |
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Interesting lines |
Lines that have exactly one point in common |
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Parallel lines |
Lines that have no points in common |
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Skew lines |
Lines that are not parallel and do not interest |
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Angle |
A figure formed by two Rays with a common endpoint |
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Vertex |
The point of intersection of two sides of an angle or figure |
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Degrees |
Unit used to measure angles |
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Acute angle |
Measures less than 90 degrees |
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Right angle |
Measures exactly 90 degrees |
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Obtuse angle |
Measures between 91 degrees and 179 degrees |
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Straight angle |
Measures exactly 180 degrees |
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Perpendicular lines |
Lines that intersect to form a right angle |
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Complementary angles |
The sum of two or more angles that add up to 90 degrees |
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Supplementary angles |
The sum of two or more angles adds up to 180 degrees |
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Vertical angle |
Forms from two intersecting lines |
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Congruent angles |
Angles with equal measures |
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Triangle |
A closed figure made of three line segments that meet only at their endpoints |
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Acute triangle |
Has three acute angles |
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Obtuse triangle |
One obtuse angle |
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Right triangle |
One right angle |
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Equilateral triangle |
Three congruent sides |
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Isosceles triangle |
At least two congruent sides |
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Scalene triangle |
No congruent sides |
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Polygon |
A closed figure with three or more line segments that do not cross |
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Regular polygon |
A polygon with all sides congruent and all angles congruent |
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Irregular polygon |
Polygon with sides that are not all congruent or angles that are not all congruent |
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Quadrilateral |
A polygon with four sides |
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Parallelogram |
A quadrilateral with two pairs of parallel sides |
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Trapezoid |
A quadrilateral with exactly one pair of parallel sides |
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Rectangle |
A parallelogram with four right angles |
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Rhombus |
A parallelogram with four congruent sides |
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Square |
A parallelogram with four right angles and four congruent sides |
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Congruent figures |
Figures that have exactly the same shape and same size |
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Similar figures |
Figures that have the same shape but not necessarily the size |
