A cube has edge length 4. What is the length of its space diagonal?
Answer and explanation
Correct answer: A. 4 root 3
- Step 1: The space diagonal is root(4^2 + 4^2 + 4^2) = root 48. Step 2. root 48 = 4 root 3. Answer: 4 root 3. Why not the others: 4 root 2: That is the diagonal of a face. 12: That adds three edges. 8: That is twice the edge.
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