That is one type of pyramid.
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there are 4 triangles and 1 rectangle in an rectangular pyramid
rectangular pyramid
5 faces: 1 rectangle and 4 triangles.
5. 1 rectangle and 4 triangles. The rectangle is known as the base, but it's still a face.
You get two congruent right triangles when you divide a rectangle diagonally. (This is one way to show that the area of each of those triangles is 1/2*base*height. Rectangle area = (4 in)(8 in) = 32 in2. Triangle area = (1/2)(4 in)(8 in) = 16 in2.)