Plane Geometry

Plane Geometry

Author: April Petrey
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Introduction to Psychology

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Common Core State Standard


1. Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having
four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses,
rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.

Plane Geometry

All about shapes on a flat surface-like how a shape looks on a paper that never ends

Regular Polygons

A polygon is a plane (2D) shape with straight sides. Regular polygons all sides and angles must be the same.



A triangle has 3 sides.



A square has 4 sides


A Pentagon has 5 sides


Can there be a polygon that does not have all equal sides? If so what would one look like? Please answer yes or no and why, then if your answer is yes draw on based on information you have found in on a website, please list your resource information.