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Ch. 8: Pinwheels & polygons. You will learn…. About special types of polygons How the measures of the interior and exterior angles of a regular polygon are related to the number of sides of the polygon How the areas of similar figures are related
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You will learn… • About special types of polygons • How the measures of the interior and exterior angles of a regular polygon are related to the number of sides of the polygon • How the areas of similar figures are related • How to find the area and circumference of a circle and parts of circles and use this ability to solve problems in various contexts
pinwheels • Composed of triangles that are rotated about a central point
polygon • Two-dimensional closed figure • Made up of straight line segments connected end-to-end • Convex: Connect interior points without going outside the shape • Regular: • If Equilateral (all sides have same length) and • Equiangular: all interior angles have equal measure
Triangles can be placed together to form a variety of shapes! • Formed with 18 triangles from 8-2:
Homework • 8-6 8-11