What shape has 8 congruent equilateral triangles as faces and 6 vertices?

What shape has 8 congruent equilateral triangles as faces and 6 vertices?
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The Platonic solid known as an octahedron would fit the givendescription
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In STL files Euler’s rule for solids can be written as a.No. of faces – No. of edges + No. of vertices = 3 x No. of bodies b.No. of faces – No. of edges + No. of vertices = No. of bodies c.No. of faces – No. of edges + No. of vertices = 2 x No. of bodies d.No. of faces – No. of edges + No. of vertices = 4 x No. of bodies

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