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    				| 1. | Can a polyhedron have for its faces?(i) 3 triangles?(ii) 4 triangles?(iii) a square and four triangles? | 
| Answer» (i) 3 triangles? No, Because a polyhedron is a solid shape bounded by polygons. (ii) 4 triangles? Yes, Because four triangles will form a tetrahedron, which is a polygon. (iii) a square and four triangles? Yes, because a square pyramid has a square and four triangles as its faces. Since pyramid is a polyhedron whose base is a polygon of any number of sides and whose other faces are triangles with common vertex. | |