It depends on how you cut it as to how many sides the two new shapes would have. You could have two shapes, each with 6 sides (cut a stop sign vertically down the middle), or you could have two identical shapes with 5 sides (cut across the diagonal).
Assuming you cut it at the angles, the answer is " A Polygon" of 5 sides, also called an irregular pentagon. If you were to cut the octagon along the straight lines, the answer would still be a polygon but then it would have 6 sides and be called an irregular hexagon. For example, cutting a stop sign vertically down the middle would give you a six sided polygon.
It is called a frustrum
hemisphere
An eight sided shape is called an octagon.
An octagon. Or more specifically, an irregular octagon.
Assuming you cut it at the angles, the answer is " A Polygon" of 5 sides, also called an irregular pentagon. If you were to cut the octagon along the straight lines, the answer would still be a polygon but then it would have 6 sides and be called an irregular hexagon. For example, cutting a stop sign vertically down the middle would give you a six sided polygon.
get a cut out shape of octagon, then get cut out triangles and try to fit in the triangles covering all the octagon but here is the solution... j
As an octagon has 8 angles, a square has 4 as has a rectangle
YES
Bisect.
It is called a frustrum
To turn a 9x9 square into an octagon you can cut corners off the square. It will not be a regular octagon though.
hemisphere
Simply that: "irregular octagon".
Whats a diagram
It becomes an hemisphere
Eight - that is why it is called an octagon.