Answer:
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If it's a regular octahedron, then you can calculate it using the formula

where

is the length of the edge.
If it's not regular, you have to calculate the area of each side individually.
2m 10cm = 210cm
Perimeter = 2(length+width)
P = 2(210+45)
P = 2(255) cm
P=450 cm
Therefore, the rectangle's perimeter is 450 cm.
Answer: 0 x 3
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