A triangle is a polygon with three sides having three vertices. The angle formed inside the triangle is equal to 180 ° . It means that the sum of the interior angles of a triangle is equal to 180 ° . It is a polygon having the least number of sides. In other words, a triangle is defined as a three-sided two-dimensional figure whose interior angles are equal to 180 ° .

A regular hexagon is a closed shape polygon which has six equal sides and six equal angles. In case of any regular polygon, all its sides and angles are equal. When we arrange six equilateral triangles side by side, then a regular hexagon is composed. Then, the area of the regular hexagon becomes equal to six times the area of the same triangle.

A pentagon is a geometrical shape, which has five sides and five angles. Here, “Penta” denotes five and “gon” denotes angle. The pentagon is one of the types of polygon. The sum of all the interior angles for a regular pentagon is 540 ° .