If your period comes every 20-21 days and stays for 5 days your cycle length is 25-26 days. That would not be considered irregular if your cycle length is relatively the same each month. You would ovulate roughly between days 11 and 13 of your cycle. Clomid could be a good way to start fertility treatment when you are trying to conceive but it would be advisable to discuss fertility treatment options with your doctor first.
You are not considered to be irregular if your period comes every 20-21 days and stays on for 5 days. Clomid is a good start when you are trying to conceive and you most likely ovulate about 12 days after your menstrual period ends.
An octogon can be regular (all sides of equal length) or irregular (all sides not of the same length).
Because it's irregular, they could be anything!
It is irregular as not all the sides have the same length.
Any polygon can be regular or irregular. "Regular" means all of its sides have the same length. Your pentagon is regular if all of its five sides have the same length. If not, then it's an irregular pentagon.
Irregular polygons.
A pentagon can be regular. But, if one of its sides is of a different length, or one of its angles is of a different measure then it is irregular.
Regular polygons have all equal length sides and irregular polygons do not.
An octagon that is not irregular is a regular octagon, one in which each of the eight sides os the same length
A triangle is a polygon. It can be regular or irregular. If it's regular, then all three sides are the same length, and it's called an "equilateral triangle". If all three sides aren't the same length, then it's an irregular polygon.
free verse
irregular hexagon
It is a prism that irregular. It is a prism but it may be diagonal, with unequal sides or with uneven edges. Any shape is irregular if it is not the way it should be or it does not have sides the correct length.