Octagon Shape How Many Sides. The internal angle at each vertex of a regular octagon is 135° (radians).the central angle is 45° (radians). An octagon has eight sides.
A helpful 'how many sides' list of geometric shapes. First, have a play with an octagon: A pentagon has 5 sides and 5 angles.
All 8 sides are equal.
A regular octagon is a closed figure with sides of the same length and internal angles of the same size. The octagon shape will be introduced to your student around the thrid grade. Enjoy a range of free pictures featuring polygons and polyhedrons of all shapes and sizes, including simple 2d shapes, 3d images, stars and curves before heading over to our geometry facts section to learn all about them. The properties of an octagon are general for most polygons.
