No, it is not necessary. Only a regular octagon needs to have equal sides and angles.
an octogon Octagon * * * * * An octagon need not have equal sides. For that it would have to be an equilateral octagon (though not necessarily regular).
If the octagon is a regular octagon (all eight sides and all eight angles are equal), then it is a regular polygon. If it is not a regular octagon (i.e. if it is an irregular octagon) then is it an irregular polygon.
Any regular shaped polygon has equal angles and equal sides
The interior angles of a regular octagon are each 135 degrees.
A regular polygon is one in which all of the sides are congruent and all the angles are congruent. In the case of a triangle, congruence of sides implies congruence of angles and conversely. However, this is not true of any polygon with more than three sides.For example, the sides of a rhombus are all equal but the angles need not be. Similarly, all four angles of a rectangle are equal (90 deg) but the sides need not be.
A regular octagon has eight equal angles. An irregular octagon need not have any equal angles, although it may have some.
an octagon * * * * * An octagon need not have equal sides. For that it would have to be an equilateral octagon (though not necessarily regular).
an octogon Octagon * * * * * An octagon need not have equal sides. For that it would have to be an equilateral octagon (though not necessarily regular).
A shape with 8 sides is called an octagon. If it has 4 right angles, it can be classified as a right octagon, which is a specific type of octagon where some angles are right angles. However, a regular octagon does not have right angles; thus, a shape with 8 sides and exactly 4 right angles may be an irregular octagon. An example could be a shape resembling a rectangle extended into an octagonal form.
If the octagon is a regular octagon (all eight sides and all eight angles are equal), then it is a regular polygon. If it is not a regular octagon (i.e. if it is an irregular octagon) then is it an irregular polygon.
Any regular shaped polygon has equal angles and equal sides
a rhombus is a parallelogram with 4 equal sides. It does not need right angles; that is a special case which is a square
It is a hexagon all of whose sides are of equal measure. Note that it need not be a regular hexagon since the angles need not be equal (in the same way that a rhombus has four equal sides but its angles are not all the same).
No, they will not fit together, you will also need a square with sides equal in length to the sides of the octagon.
10 sides and angles * * * * * A decagon need not have any equal sides. If it does have equal sides, their number can take any [integer] value in the range [2, 10].
To make a square, you need to create a shape with four equal sides and four right angles.
An octagon can have up to four pairs of parallel sides, but it need not have any.