Scalene triangle
if the angles of a figure are the same but the sides aren't, it is similiar. Congruent is angles and sides exactly the same
A similar figure has the same interior angles as a congruent figure but its sides are in proportion to a congruent figure.
Yes, they are.
marks used on a figure to indicate congruent
No, it is not true that a polygon with an odd number of angles cannot have congruent angles. A polygon can have an odd number of angles and still have some or all of them be congruent. For example, a regular pentagon has five angles that are all congruent, and a polygon with an odd number of sides can also have pairs of congruent angles.
None! If the angles are not congruent then the shapes are not similar of congruent. But that is not a problem. The angles of an equilateral triangle are not congruent to the angles of a square but that does not mean that you cannot work with equilateral triangles or squares!
A quadrilateral with 4 right angles cannot have just two congruent sides so, unless this is a trick question (2 congruent sides does not excluded the possibility of more than 2 congruent sides), the answer is there is no such plane figure.
A square is not a solid figure at all. It's a flat figure, with four congruent faces and four congruent angles.
A parallelogram cannot have only two congruent sides, nor only two congruent angles.
It is a regular polygon
A square.
No, you cannot.