Final answer:
A septagon or heptagon is a seven-sided geometric figure, differing from other polygons like octahedrons and icosahedrons that have eight and twenty sides respectively.
Step-by-step explanation:
A septagon, also known as a heptagon, is a geometric figure that has seven sides. This is clearly different from figures such as an octahedron, which consists of eight sides, or an icosahedron with twenty faces. The term 'septagon' is derived from the Latin word 'septem', meaning seven, and the Greek word 'gonia', meaning angle, noting that a septagon has seven angles in addition to its seven sides.
A septagon, also known as a heptagon, has seven sides.
Just like a triangle has three sides and a hexagon has six sides, a septagon has seven sides.
Here is a visual representation of a septagon:
Draw a straight line.
At one end of the line, draw another line that forms an angle with the first line.
Continue drawing lines that connect to the previous line, forming additional angles.
After drawing seven lines, you will have a septagon!