2 years ago

PLS HELP 15 POINTS

Mathematics

1 answer:

Semmy [17]2 years ago

4 0

Answer:

2√21

Step-by-step explanation:

Diagonal =√(L²+W²+H²)

Diagonal =√(8²+4²+2²)=√(64+16+4)=√84=2√21

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