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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) |