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in Perimeter and Area of Plane Figures by (49.2k points)
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Top surface of a raised platform is in the shape of a regular octagon as shown in the figure. Find the area of the octagonal surface.

(a) 400 m2 

(b) 348 m2 

(c) 256 m2 

(d) 476 m2 

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(d) 476 m2

Area of the octagonal surface

= 2 × \(\frac12\) × (22m + 10m) × 8m + 22m × 10m 

= 32m × 8m + 220 m2 

= 256 m2 + 220 m2 = 476 m2

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