a cube, or hexahedron.
...CUBE hAS 6 CONGRuent faceS ,8 vertices and 12 EDGES
An isosceles triangle and an equilateral triangle
A cube
It is a pentagonal prism
Assuming that a space figure means a 3-dimensional object, the answer is a square based pyramid.
This polygon is a square (4 equal sides, 4 angles that measure 90 degrees). Convex * * * * * A square is just one example. The definition is that it is a plane (2-dimensional) figure bounded by straight lines such that the lines are all equal and that the vertices of the shape are also all congruent. An equilateral triangle is the simplest example.
A similar figure has the same interior angles as a congruent figure but its sides are in proportion to a congruent figure.
A triangular prism seems to fit the given description
Not always because a quadrilateral is any 4 sided shape.
A number of straight lines, all in one plane, meeting at vertices so as to enclose a single area.
A square is not a solid figure at all. It's a flat figure, with four congruent faces and four congruent angles.
There's no such thing as one congruent figure. Two or more figuresare congruent if they have exactly the same shape and size.