Topic 15 1 Polygons

Topic 15 1 Polygons Youtube Students will be able to identify and classify polygons based on the number of sides the figure has.music by bensound. Example 1: classify the shape by sides and regular or irregular. name the type of polygon. state the number of sides. the polygon has 6 sides. 2 recall the definition. a regular polygon has sides that are the same length and angles that are the same size. an irregular polygon has sides that are not the same length and angles that are the same size.

15 1 Polygons Youtube A regular polygon has all angles equal and all sides equal, otherwise it is irregular. regular. irregular. concave or convex. a convex polygon has no angles pointing inwards. more precisely, no internal angle can be more than 180°. if any internal angle is greater than 180° then the polygon is concave. (think: concave has a "cave" in it). Sum of angles of a polygon. 1. sum of the interior angles of a polygon: sum of the interior angles of a polygon with n sides = (n – 2) × 180° for example: consider the following polygon with 6 sides. here, ∠a ∠b ∠c ∠d ∠e ∠f = (6 – 2) × 180° = 720° (n = 6 as given polygon has 6 sides) 2. sum of the exterior angles. A concave polygon has at least one angle greater than 180°. (memory tool: concave has a "cave" in it) equilateral polygon. an equilateral polygon is a polygon which has all sides of the same length. a rhombus is an example of an equilateral polygon. equiangular polygon. an equiangular polygon is a polygon whose interior angles are equal. a. A polygon is a closed figure made up of line segments (not curves) in a two dimensional plane. polygon is the combination of two words, i.e. poly (means many) and gon (means sides). a minimum of three line segments is required to connect end to end, to make a closed figure. thus a polygon with a minimum of three sides is known as triangle and.

15 1 Polygons Youtube A concave polygon has at least one angle greater than 180°. (memory tool: concave has a "cave" in it) equilateral polygon. an equilateral polygon is a polygon which has all sides of the same length. a rhombus is an example of an equilateral polygon. equiangular polygon. an equiangular polygon is a polygon whose interior angles are equal. a. A polygon is a closed figure made up of line segments (not curves) in a two dimensional plane. polygon is the combination of two words, i.e. poly (means many) and gon (means sides). a minimum of three line segments is required to connect end to end, to make a closed figure. thus a polygon with a minimum of three sides is known as triangle and. A polygon is a closed plane figure with three or more straight sides called edges. an endpoint of an edge a vertex. a polygon is regular if all of its edges are the same length and all of its angles have the same measure. polygons each have a special name based on the number of sides they have. State calculate the number of sides of the polygon. show step. using the formula s n = 180(n − 2) where n represents the number of sides for the polygon s, we can find the value of n. 3240 = 180(n − 2) n − 2 = 3240 ÷ 180 n − 2 = 18 n = 20. determine the size of the angles side lengths within the polygon.