Polygons
A polygon is a shape that has at least three straight sides and angles.
No. of sides Name of shape Minimum no. of triangles Sum of interior angles
that fit into the shape.
3 Triangle 1 180o
4 Quadrilateral 2 360o
5 Pentagon 3 540o
6 Hexagon 4 720o
7 Heptagon 5 900o
8 Octagon 6 1080o
9 Nonagon 7 1260o
10 Decagon 8 1440o
11 Hendecagon 9 1620o
http://www.superteacherworksheets.com/polygons.html
No. of sides Name of shape Minimum no. of triangles Sum of interior angles
that fit into the shape.
3 Triangle 1 180o
4 Quadrilateral 2 360o
5 Pentagon 3 540o
6 Hexagon 4 720o
7 Heptagon 5 900o
8 Octagon 6 1080o
9 Nonagon 7 1260o
10 Decagon 8 1440o
11 Hendecagon 9 1620o
http://www.superteacherworksheets.com/polygons.html