Answer: A pentagram is a symbol that takes the form of a five-pointed star polygon. The pentagram is comprised of five distinct sides. The five sides combine to create a pentagonal star by overlapping and intersecting one another. Because each side of the pentagonal star has the same length, there are ten triangles that are isosceles in shape.
Five of these ten are examples of triangles with obtuse angles. Therefore, a pentagram has a total of ten triangles, all of which are isosceles. There are five triangles with acute angles, while the other five triangles have obtuse angles.