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 square is not a solid figure at all. It's a flat figure, with four congruent faces and four congruent angles.
A number of straight lines, all in one plane, meeting at vertices so as to enclose a single area.
There's no such thing as one congruent figure. Two or more figuresare congruent if they have exactly the same shape and size.