1) Which one of these is a TRIANGULAR BASED PYRAMID? a) b) c) d) 2) Which one of these is a CUBOID? a) b) c) d) 3) Which one is a CONE? a) b) c) d) 4) Which one is a CLOSED CUBE? a) b) c) d) 5) Which one is an OPEN CUBE? a) b) c)

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