Chapter 7 Vocabulary Words
Terms : Hide Images
| 19996125 | acute angle | An angle that measures less than 90 degrees. | |
| 19996126 | acute triangle | A triangle with all angles measuring less than 90 degrees. | |
| 19996127 | angle | A figure formed by two rays sharing a common endpoint called the vertex. | |
| 19996128 | complementary angle | Two angles whose measures add to 90 degrees. | |
| 19996129 | congruent | Figures with the same size and shape. | |
| 19996130 | correspondence | The relationship between two or more objects that are matched. | |
| 19996131 | equilateral triangle | A triangle with three congruent sides. | |
| 19996132 | isoscleles triangle | A triangle with at least two congruent sides. | |
| 19996133 | line | A straight path that extends without end in opposite directions. | |
| 19996134 | line symmetry | One half of a figure is a mirror image of the other half. | |
| 19996135 | line of symmetry | The imaginary line drawn down the center of a figure with line symmetry. | |
| 19996136 | obtuse angle | An angle whose measure is greater than 90 degrees. | |
| 19996137 | obtuse triangle | A triangle containing one obtuse angle. | |
| 19996138 | parallel lines | Lines in a plane that never intersect. | |
| 19996139 | parallelogram | A quadrilateral with two pairs of parallel sides. | |
| 19996140 | perpendicular lines | Lines that intersect to form right angles. | |
| 19996141 | plane | A flat surface that extends forever. | |
| 19996142 | point | An exact location in space. | |
| 19996143 | polygon | A closed figure formed by three or more line segments that intersect only at their endpoints. | |
| 19996144 | ray | A part of a line that starts at one endpoint and extends forever in one direction. | |
| 19996145 | rectangle | A parallelogram with four right angles. | |
| 19996146 | reflection | A transformation of a figure that flips the figure across a line. | |
| 19996147 | regular polygon | A polygon with congruent sides and angles. | |
| 19996148 | regular tessellation | A regular polygon is repeated to fill a plane. | |
| 19996149 | rhombus | A parallelogram with all sides congruent. | |
| 19996150 | right angle | An angle that measures 90 degrees. | |
| 19996151 | right triangle | A triangle containing a right angle. | |
| 19996152 | rotation | A transformation in which a figure is turned around a point. | |
| 19996153 | rotational symmetry | A figure can be rotated less than 360 degrees around a central point and coincide with the original figure. | |
| 19996154 | scalene triangle | A triangle with no congruent sides. | |
| 19996155 | segment | A part of a line between two endpoints. | |
| 19996156 | square | A rectangle with four congruent sides. | |
| 19996157 | supplementary angles | Two angles whose measures have a sum of 180 degrees. | |
| 19996158 | tesselation | A repeating pattern of plane figures that completely cover a plane with no gaps or overlaps. | |
| 19996159 | transformation | A change in the size or position of a figure. | |
| 19996160 | translation | A movement of a figure along a straight line. | |
| 19996161 | transversal | A line that intersects two or more lines. | |
| 19996162 | trapezoid | A quadrilateral with exactly one pair of parallel sides. | |
| 19996163 | Triangle Sum Theorem | The theorem that states that the measures of the angles in a trianlge add up to 180 degrees. | |
| 19996164 | vertical angles | A pair of opposite congruent angles formed by intersecting lines. | |
| 19996165 | corresponding angles | Angles formed by a transversal cutting through 2 or more lines that are in the same relative position. | |
| 20347639 | quadrilateral | A four sided figure | |
| 20347711 | pentagon | A five sided figure | |
| 20347712 | hexagon | A six sided figure | |
| 20347713 | heptagon | A seven sided figure | |
| 20347714 | octagon | An eight sided figure |
