# 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.#### What is the name of a 5 sided shape?

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 ShapesTriangle - 3 Sides Square - 4 Sides Pentagon - 5 Sides Hexagon - 6 sides Heptagon - 7 Sides Octagon - 8 Sides Nonagon - 9 Sides Decagon - 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