The number of faces of the composite figure = 9.
What is a pyramid?
"It is a three-dimensional geometric shape with a polygon as its base and the lateral surfaces as triangles which meet at a common point."
What is rectangular prism?
"It is a three-dimensional geometric structure which has six faces that are rectangles."
What is a composite figure?
"A figure that consists of two or more geometric shapes."
For given example,
if the base of the pyramid sits atop the rectangular prism, then it will look like as shown in figure.
The number of faces of the composite figure are nine.
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