If the pentagon is a regular pentagon, then each of the central angles (formed by joinning the center with the vertices) is72⁰ (1/5 of 360⁰). So that 5 congruent isosceles triangle are formed,...
not posssible, you idiot. a pentagon specifically means a shape with 5 sides. penta = 5.
A Heptagon has seven sides
A pentagon has five sides.
There is 5.