A triangle.
Another OpinionI believe it is actually just called a pyramid, a triangle is a 2d figure, where actual pyramids are 3d
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It depends. A pyramid is a basic shape if you are reffering to the pyramids like the ones in Giza, Egypt those would be a square-based pyramid.
a pyramid is a 3D shape :)
A pyramid and a cone are alike because they are both are like in the same shape.
A Pyramid is a shape called a pyramid, there are no spheres in a triangulare shape.
Pyramid