A pyramid is a polyhedron with a polygonal base and triangles for sides.
A pyramid is named for the shape of its base.
Some of the polygonal pyramids are shown below.
Correct Answer: C
Step 1: The base decides the shape of the Pyramid.
Step 2: The base of the Pyramid is a rectangle.
Step 3: There are 4 base edges in the Pyramid.
Step 4: The faces of the Pyramid joining the base edge to the vertex are the triangular faces of the Pyramid.
Step 5: So, the number of triangular faces is equal to the number of base edges of the Pyramid.
Step 6: So, there are 4 triangular faces in a rectangular Pyramid.