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Geometry Unit Vocab
For Zoe; Tutoring Session
| Term | Definition |
|---|---|
| Acute Angle | An angle that measures less than 90 degrees |
| Acute Triangle | A triangle that has all angels less than 90 degrees |
| Adjacent Angles | Two angles that have a common vertex and don't overlap |
| Decagon | A polygon with 10 sides |
| Degree | A measure for angles. There are 360 degrees in a full rotation. The symbol for degrees is °. |
| Endpoint | The two furthest points on a line segment |
| Equilateral Triangle | A triangle with all three sides of equal length. All of the angles in it measure 60° |
| Hexagon | A polygon with 6 sides |
| Intersecting Lines | Lines that cross over and have a common point |
| Isosceles Triangle | A triangle with two equal sides. The angles opposite of the equal sides are equal |
| Line | Straight, has no thickness, and extends in both directions without end |
| Line of Symmetry | A line where you could fold a shape and have both sides match exactly |
| Line Segment | The part of a line that connects two points |
| Obtuse Angle | More than 90° but less than 180° |
| Obtuse Triangle | A triangle that has one angle greater than 90° |
| Octagon | A polygon with 8 sides |
| Parallel Lines | Lines that never meet. They are the same distance apart |
| Parallelogram | A quadrilateral where opposite sides are parallel |
| Pentagon | A polygon with 5 sides |
| Perpendicular Lines | lines that are at right angle to each other |
| Point | An exact location. It has no size, only location |
| Protractor | A measuring tool used to measure or draw angles |
| Quadrilateral | A two-dimensional shape with four straight sides |
| Ray | A part of a line with a start point but no end point |
| Rectangle | A two-dimensional shape with straight sides where all inside angles are right angles |
| Rhombus | A two-dimensional shape with 4 straight sides that are all equal length. It's a type of parallelogram |
| Right Angle | Equal to 90° and is one quarter of a full rotation |
| Right Triangle | A triangle that has one right angle |
| Scalene Triangle | A triangle with all sides of different lengths. No sides or angles are equal |
| Square | A quadrilateral where all sides have equal length and every angle measures 90° |
| Symmetry | When two or more parts are identical after a flip, slide, or turn |
| Trapezoid | A quadrilateral that has one pair of opposite sides parallel |
| Vertex | A point where two or more line segments meet. It can also be referred to as a corner |
| Vertices | the plural form of vertex |
Created by:
1L
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