The statement below is followed by four options. Each option is related to the item in the statement, but only one is always true. Select the option that always holds and makes the statement true.
"A pyramid (the solid shape) always has ______."
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Triangular side faces
The answer must hold for every pyramid, without exception. An option that is present in most cases but can be missing in even one case is not always true.
Option (1) Triangular side faces — a pyramid has a polygon as its base and triangular side faces that meet at one point (the apex), whatever the shape of the base, so this is always true.
Option (2) A square base — a triangular pyramid has a triangle as its base.
Option (3) Five faces — a triangular pyramid has only four faces, and a hexagonal pyramid has seven.
Option (4) A height greater than its base — a pyramid can be low and wide, with a height smaller than the side of its base.