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Ch. 10 Geometry
Jerkins 7th gr. Ch. 10 Vocabulary (Glencoe)
| Word | Description |
|---|---|
| Acute Angle | An angle with a measure greater than 0 degrees and less than 90 degrees. |
| Acute Triangle | A triangle having three acute angles. |
| Angle | Two rays with a common endpoint from an angle. The rays and vertex are used to name the angle. |
| Circle Graph | A type of statistical graph used to compare parts of a whole. |
| Complementary Angles | Two angles are complementary if the sum of their measures is 90 degrees. |
| Congruent Angles | Angles that have the same measure. |
| Congruent Segments | Sides of a polygon that having the same length. |
| Decagon | A polygon having ten sides. |
| Degrees | The most common unit of measure for angles. If a circle were divided into 360 equal-sides parts, each part would have an angle measure of 1 degree. |
| Equilateral Triangle | A triangle having 3 three congruent sides. |
| Heptagon | A polygon having seven sides |
| Hexagon | A polygon having six sides. |
| Indirect Measurement | Finding a measurement by using similar triangles and writing a proportion. |
| Isosceles Triangle | A triangle having at least two congruent sides. |
| Line of Symmetry | A line that divides a figure into two haves that are reflections of each other. |
| Line Symmetry | Figures that match exactly when folded in half have line symmetry. |
| Nonagon | A polygon having nine sides. |
| Obtuse Angle | Any angle that measures greater than 90 degrees but less than 180 degrees. |
| Obtuse Triangle | A triangle having one obtuse angle |
| Octagon | A polygon having eight sides. |
| Parallelogram | A quadrilateral with opposite side parallel and opposite side congruent. |
| Pentagon | A polygon having five sides. |
| Polygon | A simple closed figure in a plane formed by three or more line segments. |
| Quadrilateral | A closed figure having four sides and four angles. |
| Reflection | A type of transformation where a figure is flipped over a line of symmetry. |
| Regular Polygon | A polygon that has all sides and all angles congruent. |
| Rhombus | A parallelogram having four congruent sides. |
| Right Angle | An angle which measures exactly 90 degrees. |
| Right Triangle | A triangle having one right angle. |
| Scalene Triangle | A triangle having no congruent sides. |
| Similar Figures | Figures that have the same shape and congruent angels but not necessarily the same size. |
| Straight Angles | An angle that measures exactly 180 degrees. |
| Supplementary Angles | Two angles are supplementary if the sum of their measures is 180 degrees. |
| Tessellation | A repetitive pattern of polygons that fit together with no holes or gaps. |
| Transformation | A movement of a geometric figure. |
| Translation | One type of transformation where a geometric figure is slid horizontally vertically, or both. |
| Trapezoid | A quadrilateral with one pair of parallel sides. |
| Triangle | A polygon with three sides and three angles. |
| Vertex | A vertex of an angle is the common endpoint of the rays forming the angle. |
| Vertical Angles | Opposite angles formed by the intersection of two lines. |
Created by:
jerkins
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