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in Mensuration by (50.4k points)
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We have 4 congruent equilateral triangles. What do we need more to make a pyramid?

(a) An equilateral triangle.

(b) A square with same side length as of triangle.

(c) 2 equilateral triangles with side length same as triangle.

(d) 2 squares with side length same as triangle.

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(b) A square with same side length as of triangle.

We have to add a square with same side length as of triangle to make a pyramid. As we know a pyramid is a polyhedron whose base is a polygon and lateral faces are triangles.

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