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Definition
| All sides are congruent. Has a right angle. All opposite sides are parallel. A quadrilateral -4 sides. |
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| All opposite sides are parallel. A quadrilateral -4 sides |
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| A line segment connecting two vertices across a polygon. |
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| The three angles of a triangle = 180 degrees. |
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| Obtuse triangles have one obtuse angle (angle greater than 90 degrees.) |
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| Has two congruent sides. Has a right angle. All opposite sides are parallel. |
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| Has four congruent sides. All opposite sides are parallel. |
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Definition
| Only one pair of sides are parallel. A quadrilateral - 4 sides. |
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Definition
| Means the SAME. Polygons are congruent if they have the same sized angles and the same simangles. |
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Definition
| Identical in shape, but not size. |
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| Name the parts of a triangle |
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Term
| change a percent to a decimal |
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Definition
| Move the decimal two places to the left. PeDaL (percent decimal go left.) |
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Definition
| To cut an angle or segment in half. |
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| A dot with no length or width, it just specifies an exact location. |
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| A part of a line starting at a point and extending infinitely in one direction. |
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| A section of a line. A line segment has two endpoints. |
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| A straight path that connects two points and extends infinitely in both directions. |
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| A point used to define a line segment or ray. A line segment has two endpoints; a ray has one. |
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Definition
| Right triangles have one right angle (an angle equal to 90 degrees.) |
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Definition
| Acute triangles have three acute angles (less than 90 degrees.) |
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| Equiangular triangles have all three angles the same size. |
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| 4 ways to classify triangles by their angles |
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Definition
| Equiangular, Acute, Obtuse, Right. |
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Definition
| All 3 sides of the triangle are the same length. |
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Term
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Definition
| At least 2 sides are the same length. |
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Definition
| No sides are the same length. |
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| 3 ways to classify triangles by the length of their sides. |
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Definition
| Scalene, Isosceles, and Equilateral. |
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Term
| two ways to classify triangles |
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Definition
| The length of their sides. The size of their angles. |
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Term
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Definition
| The sum fo two angles equals 180 degrees. |
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Definition
| The sum of the squares of the legs of a right triangle is equal to the square of the hypotenuse. |
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Definition
| Vertical angles are angles opposite one another at the intersection of two lines. Vertical angles are congruent. |
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| Two angles in a plane which share a common vertex and a common side but do not overlap. |
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| A line that cuts across a set of lines or sides of a plane figure. Transversals often cut across parallel lines. |
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Definition
| The angles in matching corners are called corresponding angles. |
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