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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. |