(10/12)(100) = (5/6)(100) = 83.3% not cracked
Tetrahedron is a Platonic solids which is also a pyramid, i.e. Option (A).
Pyramid is a three dimensional shape. Pyramid is a polyhedron formed by connecting a polygonal base and a point. A triangular pyramid is also called a tetrahedron.
So,
As mentioned in the above definition "A triangular pyramid is also called a tetrahedron."
Hence, we can say that Tetrahedron is a Platonic solids which is also a pyramid, i.e. Option (A).
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That would be 6,610,000 answer