Standard Mathematics Primary 4 Geometry

The diagram shows the net of a 3D solid. The net has exactly 2 triangular faces and 3 rectangular faces. Which solid does this net belong to?

A Cuboid
B Square pyramid
C Triangular prism
D Cylinder
Show Worked Solution

Worked Solution

Step 1: Count the faces in the net: 2 triangles + 3 rectangles = 5 faces total. Step 2: Match to known solids. Cuboid: 6 rectangles, no triangles. Does not match. Square pyramid: 1 square + 4 triangles. Does not match. Triangular prism: 2 triangular bases + 3 rectangular side faces = 5 faces. Matches. Cylinder: 2 circles + 1 rectangle. Does not match. Step 3: The net with 2 triangles and 3 rectangles belongs to a triangular prism. Answer: Triangular prism

Correct answer: Triangular prism

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