1.

The development of lateral surfaces of a pentagonal pyramid is ________(a) Five rectangles(b) Five squares(c) Five triangles(d) Five circles

Answer» Right option is (c) Five triangles

To explain: A pentagonal pyramid is a pyramid with a pentagonal base upon which are erected five triangular faces that meet at a point (the vertex). Like any pyramid, it is self-dual. The regular pentagonal pyramid has a base that is a regular pentagon and lateral faces that are equilateral triangles.


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