There is a good way to know if a polyhedra is convex. If you place the shape inside a sphere and all of the vertexes were touching the edge of the sphere, then it would be convex. If all of the vertexes didn't touch the edge, then it would be concave. How simply is that?
A simple polygon that is not convex is called concave, non-convex or reentrant. A concave polygon will always have an interior angle with a measure that is greater than 180 degrees.
The opposite of convex is concave. Concave shapes have an inward curve, while convex shapes have an outward curve.
It can be convex or concave.
convex and concave
Geometric solids can be classified into several types, including polyhedra and non-polyhedra. Polyhedra are three-dimensional shapes with flat polygonal faces, such as cubes, tetrahedra, and octahedra. Non-polyhedra include curved surfaces, such as cylinders, cones, and spheres. Additionally, solids can be categorized based on their properties, such as regular or irregular, convex or concave.
1. plain mirror2. concave mirror 4. concave lens3.convex mirror 5.convex lens
concave=in convex=out
convex
A rhombus is an equilateral parallelogram. As such, it is neither concave nor convex.
The Rear view mirrors are convex The Headlights are concave
The opposite of concave is convex. A concave surface curves inward, while a convex surface curves outward.
concave