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20. Using Euler's formula find the unknown value:FACESVERTICES(i)2012EDGES61259(iv)55-- |
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Answer» Answer: Ncert solutions Grade 8 Mathematics Science Chapters in NCERT Solutions - Mathematics , CLASS 8 Exercises in Visualising Solid Shapes Question 7 Q7) USING Euler’s formula find the unknown. Solution 7: (i) Faces-?,vertices-6,edges-12 Euler's formula: F+V–E=2 F+6–12=2 F=2+12–6=8 F=8 (II) Faces-5,vertices-?,edges-9 Euler's formula: F+V–E=2 5+V–9=2 V=2+9–5=6 V= 6 (iii) Faces-20,vertices-12,edges-? Euler's formula: F+v–E=2 20+12–E=2 , E=20+12–2 E=30 |
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