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Geometry Unit Vocab
Geometry Unit Vocabulary
| TERM | DEFINITION |
|---|---|
| POINT | An exact location in space |
| LINE | A straight arrangement of points that extends forever in opposite directions |
| LINE SEGMENT | A part of a line that consists of two endpoints and all the point between |
| RAY | A straight arrangement of points that extends forever in one direction |
| PLANE | A flat surface that extends forever |
| ANGLE | The figure formed when two rays share a common endpoint |
| VERTEX | The point where two rays (or line segments) meet |
| SIDES OF AN ANGLE | The rays that form an angle |
| DEGREE | The unit commonly used to measure the size of an angle |
| PROTRACTOR | A geometric tool used to measure an angle |
| ACUTE ANGLE | An angle with the measure greater than 0° and less than 90° |
| RIGHT ANGLE | An angle with the measure equal to 90° |
| OBTUSE ANGLE | An angle with the measure greater than 90° and less than 180° |
| STRAIGHT ANGLE | An angle with the measure equal to 180° |
| PARALLEL LINES | Two lines in the same plane that do not intersect |
| PERPENDICULAR LINES | Two lines that intersect to form right angles |
| SKEW LINES | Two lines in different planes that do not intersect |
| INTERSECTING LINES | Lines that meet or cross each other at one point |
| VERTICAL ANGLES | When two lines intersect, the angles that are not next to each other |
| CONGRUENT | Equal in measure |
| ADJACENT ANGLES | When two lines intersect, the angles that are next to each other |
| COMPLEMENTARY ANGLES | Two angles for which the sum of their measure is 90° |
| SUPPLEMENTARY ANGLES | Angles for which the sum of their measure is 180° |
| TRANSVERSAL | A line that intersects two parallel lines |
| CORRESPONDING ANGLES | Angles that occupy the same relative position |
| SCALENE TRIAGLE | A triangle in which no sides are the same length |
| ISOSCELES TRIANGLE | A triangle in which two sides are the same length |
| EQUILATERAL TRIANGLE | A triangle in which three sides are the same length |
| ACUTE TRIANGLE | A triangle in which all angles are acute angles |
| RIGHT TRIANGLE | A triangle in which one angle is a right angle |
| OBTUSE TRIANGLE | A triangle in which one angle is an obtuse angle |
| CIRCLE | A closed, curved shape in which all points on the circle are equal distance from the center |
| TRIANGLE | A polygon with three sides |
| QUADRILATERAL | A polygon with four sides |
| PARALLELOGRAM | A quadrilateral with two pairs of parallel sides |
| RECTANGLE | A quadrilateral with two pairs of parallel sides and four right angles |
| RHOMBUS | A quadrilateral with two pairs of parallel sides and four sides of equal length |
| SQUARE | A quadrilateral with two pairs of parallel sides, four right angles, and four sides of equal length |
| TRAPEZOID | A quadrilateral with one pair of parallel sides |
| PENTAGON | A polygon with five sides |
| HEXAGON | A polygon with six sides |
| HEPTAGON | A polygon with seven sides |
| OCTAGON | A polygon with eight sides |
| NONAGON | A polygon with nine sides |
| DECAGON | A polygon with ten sides |
Created by:
Miss Kinman
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