Question

What's a polygon with four unequal sides called?

Answer 1

A polygon with four unequal sides is called a quadrilateral.
A flat image that can be displayed in three dimension is called a hologram. 
Giga stands for 10 to the 9th power.
A Icosahedron has 20 equal sides.
Mathematicians call a regular polygon with eight sides, an Octagon. 

Hope this helps ^-^

Answer 2

First one: A quadrilateral.

Second one: A hologram

Third one: One billion.

Fourth: Twenty.

Fifth one: An octagon

Hope this helpes :)