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16 Cards in this Set
- Front
- Back
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Point |
A location in space represented by a dot. No length. |
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Line |
A set of points extending without end in opposite directions. A double-arrow is used to represent infinte length. There are infinite number of points on a line, only a few are labeled. |
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Plane |
A set of points that form a flat surface. Planes are two dimensional. |
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Ray |
A portion of a line that has one end point and continues infinately in one direction. |
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Line Segment |
A portion of a line with two endpoints. |
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Angle |
The union of two rays with an endpoint. The common endpoint is called a Vertex. |
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Angle Types 1.Acute Angle 2.Right Angle 3.Obtuse Angle 4. Straight Angle |
1. Less than 90° 2. = to 90° 3. More than 90°, Less than 180° 4. = to 180° |
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Adjacent Angles |
Share a common ray and vertex but no interior points. |
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Obtuse Triangle |
Has at least on ontuse angle. |
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Altitude |
A segment from a vertex perpendicular to the opposite side. Forms a 90° angle to the base. |
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Median |
A segment from a vertex to the midpoint of the opposite side. Divides base into 2 = parts. |
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Angle bisector |
A line, segment, or ray passing through the vertex of a triangle and bisecting that angle. |
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Perpendicular Bisector |
A segment, line, or ray that is perpendicular to and passes through the midpoint of a side. |
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Postulate |
(Or Axiom) is a statement that is accepted to be true but cannot be proven. It's a given. |
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Theorum |
A statement that can be proven true using a logical argument based on facts and statements that are accepted to be true. |
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Collinear |
A set of points that all lie on the same line is described as collinear. |
