Question

A student have 4 congruent equilateral triangles. What do we need more to make a pyramid?​

Answer 1

A square with same side length as of triangle.

Because, pyramid has a polygon base, so we require a square and on each edge of polygon there lies a triangle.

We have a 4 equilateral triangle, so we need polygon with all 4 sides equal.

So, we must take square.

And as triangle lies on edges of square, so its side must be equal to side of triangle.

Answer 2

Step-by-step explanation:

We have to add a square with same side length as of triangle to make a pyramid.