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28 Cards in this Set
- Front
- Back
Point
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a. Most basic term in geometry, (undefined)
b. A location c. Represented by a capital letter |
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Line
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a. Infinite number of points extending in a continuous straight line
b. A line is determined by 2 points c. Line has 1 dimension – length d. Can’t measure a line |
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Plane
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Flat Surface with continuous length and width
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Collinear
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Two or more points on the same line
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Line Segment
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a. A subset of a line that has an endpoint
b. Can measure a line segment |
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Ray
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a. A subset of a line containing one endpoint
b. Extends infinitely in one direction |
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Congruent Segments
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Two or more line segments that are the same size
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Midpoint
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A point that divides a line segment into 2 congruent segments
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Definition
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A statement that explains or clarifies the meaning of a word or phrase
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Coplanar
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On the same plane
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Angle
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a. A geometrical figure that consists of two rays with a common endpoint (vertex)
b. Must put “<” in front of and angle’s name c. Example: < SBC i. The middle letter is always the letter that goes in the middle of the angle |
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Angle Bisector
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A ray from the same vertex of an angle and creates two congruent angles
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Counter Example
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Something that fits the definition but isn’t what you were trying to describe
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Right Angle
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An angle that measures exactly 90 degrees
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Acute Angle
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An angle that measures less than 90 degrees
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Obtuse Angle
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An angle that measures greater than 90 degrees
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Pair of Vertical Angles
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Two non-adjacent angles that are formed by two intersecting lines
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Linear Pair of Angles
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Two adjacent angles whose measures add to 180 degrees
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Pair of Complementary Angles
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Two angles whose measures add up to 90 degrees
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Pair of Supplementary Angles
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Two angles whose measures add up to 180 degrees
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Parallel Lines
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Lines in the same place that never miss (symbol ll)
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Perpendicular Lines
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Lines that meet at 90 degree angles
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Diagonal
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A line segment that connects two non adjacent vertices
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Convex Polygon
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A polygon where all the diagonals fall inside the polygon
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Concave Polygon
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A polygon where at least one diagonal falls outside of the polygon
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Congruent Polygons
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Polygons are congruent if only their corresponding sides and angles are congruent
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Equilateral Polygon
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A polygon that has all congruent sides in length
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Equiangular Polygon
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A polygon in which all the angles are congruent
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