Q26 of 102 Page 181

Fill in the blanks to make the statements true:

If a solid shape has 12 faces and 20 vertices, then the number of edges in this solid is ……… .

According to Euler’s formula, in any solid (Faces)+(Vertices)=(Edges)+2 or F+V=E+2

Therefore, 12+20=x+2 gives x=20

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