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24
You'll need 18 straws because it has 18 edges
A triangular prism has 5 faces: 2 bases that are triangles, and 3 rectangles.
six, you need six
A triangular prism has five faces.
9
10
9 straws because it has 9 edges, 6 vertices and 5 faces
18 straws.
8
8
15 straws are needed
6 of them
15
6
24
You'll need 18 straws because it has 18 edges