Lesson 1.6 Classify Polygons

Objective Classify Polygons

Standard 12.0 – Students find and use measures of sides and of interior and exterior angles of triangles and polygons to classify figures and solve problems.

Academic Language Polygon Convex Concave n-gon Equilateral Equiangular regular

Polygon A figure formed by 3 or more line segments called sides and can only intersect at most one other side. – Each endpoint of a side of a polygon is a vertex – Polygons can be named by listing vertices in consecutive order

Convex Polygon A polygon where no side contains an interior point of the polygon A polygon that is not convex is called non- convex polygon or ……. Concave polygon

Examples

Exampls

Classify Polygons Named by the number of sides

n-gon General polygon Can be used to name any polygon Example 14 sides 14-gon

Equilateral Polygon All sides are congruent

Equiangular Polygon All angles in the interior of the polygons are congruent

Regular Polygon Convex polygon that is both equiangular and equilateral

Example

The real world

Homework p.44 #1, 3, 7, 11, 17, 23, 38