Answer:Convex:Triangles, squares, rectangles, regular pentagons, regular hexagons, and octagons are all examples of convex polygons. A stop sign is a real-world example of a convex polygon. non- convex:An arrow shape, a star, or a polygon with a "cave-in" or indentation is a non-convex polygon. Step-by-step explanation:A convex shape is one where any line segment connecting two points within the shape lies entirely within the shape. A non-convex (or concave) shape is one where at least one line segment connecting two points within the shape goes outside the shape. Essentially, a convex shape bulges outwards, while a non-convex shape has at least one indentation or inward curve.