How many degrees are there in a pentagon?
The interior angles of a pentagon sum to 540 degrees.
An irregular pentagon would have the same number of degrees (collective angle degrees) as a regular pentagon. (But, honestly, I don't know the number of degrees in a pentagon right off the top of my head.) Just like how all triangles have a total of 180 degrees and all quadrilaterals have a total of 360 degrees.
How many degrees a regular polygon measures depends on how many sides it has. For example, a pentagon measures 540 degrees. A triangle measures 180 degrees. To calculate a pentagon for example, use this formula. A pentagon has 5 sides. Take away 2 which is 3. Then multiply it by 180 to get your answer.
360o A pentagon is constructed of line segments or of angles. Either of those will do the job. But no matter how many degrees you have, you can't build a pentagon from them. After your pentagon is constructed, it's possible to measure the angles inside it. Those measurements will always add up to a total of 540 degrees.