No, they are all similar but, since the radii can differ, they need not be congruent.Two objects are congruent if they have the same dimensions and shape. Very loosely, you can think of it as meaning 'equal', but it has a very precise meaning that you should understand completely, especially for complex shapes such as polygons.
congurent angles are angles that have equal angles. Example, if you want to have equal angles, you have to have a shape that has equal sides
yes
Yes, all circles are similer, they all have 1 line, all the same shape, any quarter of a circle will always be 25%, but it the line is bigger they still have differances and similarities, e.g a circle can have a radius of 25cm while another can have a radius of 93984389569349billion miles
Circles that have congruent radii. Congruent=coinciding at all points when superimposed (http://dictionary.reference.com/browse/congruent)
no
a rhombus
Regular
A square has that.
an equilateral triangle
Yes.
An equilateral triangle.
Any regular polygon.
congurent angles are angles that have equal angles. Example, if you want to have equal angles, you have to have a shape that has equal sides
A right prism.
nothing
Yes.
A congurent half is the same as a line of symetry. It is a half that is the same shape, size and length as the other half