Standard Mathematics Primary 4 Geometry

Which of the following is NOT a valid net for a cube?

A The cross shape (+ sign)
B The T-shape with 4 squares in a row and 2 squares on top of the second square
C The straight line of 6 squares
D The L-shape with 5 squares in a row and 1 square attached to the fourth square
Show Worked Solution

Worked Solution

Step 1: Check each arrangement: does it have 6 squares? Yes for all. Step 2: Check if folding causes overlap. Step 3: A straight line of 6 squares causes overlaps when you try to fold it into a cube—adjacent pairs would clash. Step 4: The other three are valid nets.

Correct answer: The straight line of 6 squares

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