If all the sides and angles of a pentagon were equal, you would be able to put a mirror through the centre, and have the reflection be equal to the original image. This means that it would have reflective symmetry. If a pentagon does not have reflective symmetry, then it's angles and side lengths cannot all be the same. Thus, it is an irregular pentagon.
A pentagon does have reflective symmetry.
a pentagon
An irregular pentagon.
Pentagon prism
1 square4 triangles4 rectangles
A Pentagon. A five sided figure is a pentagon
A shape with 5 sides is a pentagon
No.
no
Yes.
None.
2