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Polygons 5G3&4
Classify Shapes
| Term | Definition |
|---|---|
| polygon | A closed plane figure (2-D) made up of line segments |
| regular polygon | A polygon that has sides of equal length and angles of equal measure |
| triangle | A polygon with 3 sides |
| quadrilateral | A polygon with 4 sides |
| pentagon | A polygon with 5 sides |
| hexagon | A polygon with 6 sides |
| octagon | A polygon with 8 sides |
| equilateral triangle | A triangle whose sides all have the same length |
| isosceles triangle | A triangle with two sides of the same length |
| scalene triangle | A triangle in which no sides have the same length |
| right triangle | A triangle in which one angle is a right angle |
| acute triangle | A triangle whose angles are all acute angles |
| obtuse triangle | A triangle in which one angle is an obtuse angle |
| parallelogram | A quadrilateral with 2 pair of parallel and congruent sides |
| trapezoid | A quadrilateral with exactly one pair of parallel sides |
| rectangle | A parallelogram with 4 right angles |
| rhombus | A parallelogram with all sides the same length |
| square | A rectangle with all sides the same length |
| congruent | Same size or equal |
| attributes | A feature used to describe a shape such as lines and angles. Also known as properties of a shape. |
| 2 - dimensional figures | A shape that has width and height, but no thickness |
| classify | To arrange in groups based on common attributes or properties |
| category | A group of of objects (or shapes) with common attributes |
| sub category | A smaller group within a category, that is classified by having common attributes not shared with rest of the objects in the category |
| parallel lines | lines that never intersect (cross) and are the same distance apart |
| opposite angles | Angles on a quadrilateral that are diagonally across from each other |
| consecutive angles | Angles on a quadrilateral that are next to each other. |
| adjacent sides | Two sides of a polygon that meet at the same vertex (point) |