octagon
An Octagon
An 8 and a 3
--any shapes with proportionally equal sides are "Similar" if you had a rectangle with one side hat was 4 and the other 8 and another rectangle with sides 8 and 16, you would have proportionally equal sides because (4/8)=(8/16)
If two figures are similar, they have the same shape but may differ in size. This means their corresponding angles are equal, and their corresponding sides are in proportion. For example, if one triangle has sides of 3, 4, and 5, and another triangle is similar with sides of 6, 8, and 10, the ratios of their sides (3:6, 4:8, 5:10) are consistent, confirming their similarity.
Congruent figures are similar - in sides as well as angles. Corresonding angles of similar figures congruent but their sides are not. The sides are all in some fixed ratio. [If that ratio is 1, the figures are congruent.]
the any sides of figures.....
I assume you mean 4 congruent sides or 2 pairs of congruent sides.. (There are no 4-sided figures with 8 sides.) A square.
Corresponding Sides
A Quadrilateral. Figures that have four equal sides are called squares. Whereas, other figures that have four unequal sides are called quadileterals
Here are some figures that have a number of sides that is a composite number:Two-dimensional figures includesquarehexagonoctagonnonagonThree-dimensional figures includetetrahedroncubeoctahedronicosahedron
2 dimensional (plane) figures can have three or more straight edges as sides. 3 dimensional (solid) figures can have four or more plane sides (faces). They can have fewer sides if the sides are not straight.
Pentagons