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)
the any sides of figures.....
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.]
Corresponding Sides
I assume you mean 4 congruent sides or 2 pairs of congruent sides.. (There are no 4-sided figures with 8 sides.) A square.
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
Pentagons
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.
Congruent Figures has equal sides, angles, shape and size.