# What is the definition of a complex shape?

Complex Shapes. Most shapes occurring in the physical world are complex. Complex shapes combine parts or all of simple shapes. These complex shapes include polygons and other shapes that may include parts of circles, squares, triangles, ellipses, and rectangles.
A.

### What is the name of the shape of a teardrop?

Drop (teardrop) – Shapes of Moldavites. Frantisek / December 23, 2014. Droplet-shaped moldavites, sometimes also called teardrops, belong to the most popular shapes. Droplets are considered a primary shape (full-forms of moldavites).
• #### Why is a football shaped like an oval?

The rugby ball's distinctive shape is supposedly due to the pig's bladder, although early balls were more plum-shape than oval. The balls varied in size in the beginning depending upon how large the pig's bladder was. Because of the pliability of rubber the shape gradually changed from a sphere to an egg.
• #### What is a 3d cone called?

A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex.

pentagon
B.

### What is this shape called?

A five-sided shape is called a pentagon. A six-sided shape is a hexagon, a seven-sided shape a heptagon, while an octagon has eight sides…
• #### What is a shape that has 9 sides?

2D Shapes
Triangle - 3 SidesSquare - 4 Sides
Pentagon - 5 SidesHexagon - 6 sides
Heptagon - 7 SidesOctagon - 8 Sides
Nonagon - 9 SidesDecagon - 10 Sides
More
• #### What is called a 12 sided shape?

In geometry, a dodecagon or 12-gon is any twelve-sided polygon.
• #### What shapes have four sides?

Polygons are closed shapes that have only straight lines, and polygons that have four sides and four angles are called quadrilaterals. There are six different types of quadrilaterals: parallelogram, rectangle, rhombus, square, kite, and trapezoid.
C.

### What is the name of the shape of a football?

A football is a prolate spheroid, and it's shaped that way because that's also the shape of an inflated pig's bladder, which is what the first footballs were made of.
• #### What are footballs made of today?

These days, footballs are typically made from cowhide or vulcanized rubber, making their nickname "pigskins" somewhat ironic. Football fans often perpetuate the idea that footballs used to be made of pigskin, which is how they got their nickname, but it turns out this isn't the case.
• #### What is the shape of a ball?

A sphere (from Greek σφα?ρα — sphaira, "globe, ball") is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball (viz., analogous to the circular objects in two dimensions, where a "circle" circumscribes its "disk").
• #### What is the correct pressure for a size 5 football?

Good question as this is actually governed by FIFA. The air pressure in a regulation size 5 ball must be between 8.5 - 15.6 psi (0.8 ±0.005 bar). Referees check the ball to make sure it is suitable before each game.

Updated: 2nd October 2019