a pentagon is a 2 dimensional figure. It does not have a base.
A Pentagon. That's why its call a Pentagon.
The base of a pentogon.
There are infinitely many 3-dimensional shapes with a pentagon as its base.
It is five sided, but it is not a regular pentagon. So it is a pentagon.
The base of a pentagon is a straight line. In a regular pentagon, the two adjacent sides include obtuse angles of 108 degrees.
It is the sum of the lengths of the five sides of the pentagon.
The base of a pentagonal prism is a pentagon. Just like a square pyramid has a square for a base, a pentagonal prism has a pentagon for a base.
A pentagon-based pyramid
A pentagon consists of 5 bases and 5 angles.
a pentagon
pentagon
A pentagon.