If at least one interior angle of a polygon is greater than 180 degrees, then the polygon is called:
Two angles, of a paralleogram, which have no common arm are called the opposite angles. Is it true or false ?
If at least one angle of a polygon is more than 180 degree, then the polygon is called a concave polygon. Is it true ?
how many sides does a regular polygon have, each interior angle of whish is of measure 180 degree?