540 degrees 540o
The angles (rather than angels) of a quadrilateral add up to 360 degrees.
The exterior angles of a 15 sided shape add up to 360 degrees
They add up to 3960 degrees
180
360
The angles (rather than angels) of a quadrilateral add up to 360 degrees.
The 7 interior angles add up to 900 degrees
A five sided shape is a pentagon
1080 ish.
360
five sides...
180
360
720
540
They add up to 3960 degrees
The exterior angles of a 15 sided shape add up to 360 degrees