The physics students needed to use a concave and a convex lens to see how each affected the light passing through it. A A polygon is convex if it contains one or more interior angles greater than 1 8 0 ∘. ; C A polygon is convex if it contains one or more interior angles less than 1 8 0 ∘. So no interior angle is greater than 180°. In a Convex Polygon, all points/vertices on the edge of the shape point outwards. Another term is re-entrant polygon. A convex polygon has no angles that point inward, whereas a concave polygon makes something that looks like a cave, as Math is Fun nicely states, and where angles point toward the interior of the polygon. A Convex Polygon and a Concave Polygon are 2 different types of Polygons. POLYGONS ASSIGNMENT Classify each of the following figures as concave polygon, convex polygon or not a polygon. A line containing some of the sides will pass through the interior of the nonagon, so it is concave. 1) _____Convex_____ 2) _____Convex _____ 3) __ __Concave_____ 4) ____ Concave ____ 5. Extended Response The pattern on a soccer ball is designed using polygons. A convex polygon has all its vertices, or corners, pointing out from the center, but a concave polygon looks like it has been caved in. Names of Polygons Then classify it as convex or concave, regular or irregular. Currently, what I have been attempting to do is: Take each point out of the polygon; Test the point to see if it falls within the polygon created by the rest of the set; If true remove the point; If false keep the point 5) not regular 6) regular In the case of a convex polygon, it is easy enough to see, however, how triangulating the polygon will lead to a formula for its centroid. If a set is not convex it is termed nonconvex.A polygon is convex if and only if its corresponding polygonal region is convex. For example, The math teacher wanted the students to identify which polygons were concave. And a regular polygon is one that is both equilateral (all sides are congruent) and equiangular (all angles are congruent). ; D A polygon is convex if some of its vertices point “inward,” toward the center. We may use the word concave to describe a nonconvex polygon (but not a nonconvex set of points). The Polygon Exterior Angle sum Theorem states that the sum of the measures of the exterior angles, one angle at each vertex, of a convex polygon is _____. (In a concave polygon, some diagonals will lie outside the polygon). Within mathematics, concave refers to a polygon that has one or more interior angles greater than 180 degrees. 1) concave 2) convex 3) convex 4) concave State if each polygon is regular or not. You now see that polygons can be regular or irregular, convex or concave, and simple or complex. Hence, regular polygons are never concave. The sum of the measures of the exterior angles of a polygon with n sides is: (n - 2) × 180 6. ; B A polygon is convex if all of the line segments drawn between two points, on or inside the polygon, are contained within the polygon. Name the polygon by its number of sides. Answer: nonagon, concave, irregular Example 1b: right A corollary of the Triangle Sum Theorem states that a triangle can contain no more than one _____ angle or obtuse angle. There are 9 sides, so this is a nonagon. Concave Polygon, Convex Polygon. I would like to deconstruct the following polygon shown in blue removing all of the points from the polygon that cause concavity. The sides are not congruent, so it is irregular. An easy way to remember the difference between convex and concave polygons is to think of a polygon with a side caved or dented in. , the math teacher wanted the students to identify which polygons were concave polygon are 2 different of! 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