Section 6
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A polygon is a closed, two-dimensional shape formed by three or more straight line segments that connect end to end. Polygons can be classified as either convex or concave based on whether any interior points are contained within lines drawn along its sides. Common types of polygons include triangles, squares, rectangles, and circles, each with their own formulas to calculate perimeter, circumference, or area.
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Section 6
- 2. Polygon A polygon is a closed figure formed by a finite number of coplanar sugments such that The sides that have a common endpoint are noncollinear, and Each side intersects exactly two other sides, but only at their endpoints.
- 3. Polygon A polygon is name by the letters of its vertices, written in order of consecutive vertices.
- 4. Polygon Polygons can be concave or convex. Suppose the line containing each side is drawn. If any of the lines contain any point in the interior of the polygon then it is concave. Otherwise it is convex.
- 5. Types of Polygons A polygon with n sides is an n-gon. A convex polygon in which all sides are congruent and all the angles are congruent is called a regular polygon.
- 6. Perimeter, Circumference, and Area The perimeter P of a polygon is the sum of the length of the sides of the polygon. The circumference C of a circle is the distance around the circle. The area A is the number of square unites needed to cover a surface.
- 7. Triangle
- 8. Square
- 9. Rectangle
- 10. Circle