© copyright 2003-2020 Study.com. - Definition & Shapes. - Definition, Formula & Examples, What Are the Seven Elements of Art? {{courseNav.course.mDynamicIntFields.lessonCount}} lessons Copyright © 2020 Studypad Inc. All Rights Reserved. Create Assignment. Anyway, a polygon is a two-dimensional shape with straight sides. Tech and Engineering - Questions & Answers, Health and Medicine - Questions & Answers. An error occurred trying to load this video. Most of its sides are straight, but not all, so it's not a polygon. % Progress . For a shape to be a polygon, a few things must be true. The parts of polygons include the sides, interior angles and exterior angles. The vertex of a convex polygon always points outwards from the center of the shape. What is the measure of each exterior angle of a regular hexagon? What makes a polygon a polygon? 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But angles come in two varieties. MEMORY METER. In a square, the interior angles are 90 degrees. A pentagon has five of these, which we call vertices. No. We already discussed its sides. Try refreshing the page, or contact customer support. A circle? Polygons are one of the most all-encompassing shapes in geometry. Create an account to start this course today. I'm not sure you should, though. How to Find the Number of Diagonals in a Polygon, Quiz & Worksheet - Properties of Regular Polygons, Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, Parallel Lines: How to Prove Lines Are Parallel, Using Converse Statements to Prove Lines Are Parallel, Constructing a Parallel Line Using a Point Not on the Given Line, The Parallel Postulate: Definition & Examples, Measuring the Area of Regular Polygons: Formula & Examples, Measuring the Angles of Triangles: 180 Degrees, Biological and Biomedical And then it must have only straight sides. A planar polygon is convex if it contains all the line segments connecting any pair of its points. Irregular Polygons. - Definition & Examples, How to Measure the Angles of a Polygon & Find the Sum, How to Find the Area of Irregular Polygons, Using Fractions in Everyday Life: Examples & Importance, What is a Fraction? Enrolling in a course lets you earn progress by passing quizzes and exams. Here are a few examples of irregular polygons. Convex Polygon. Now let's inspect the polygon's joints, or the spot where two sides meet. Thus, for example, a regular pentagon is convex (left figure), while an indented pentagon is not (right figure). In this lesson, find out the answers to these questions and more as we learn all about polygons and their parts. The quiz will test your knowledge of polygons, such as: You can get to know more by reviewing the lesson named What is an Irregular Polygon?