top surface of a raised platform is in the shape of a regular octagon as shown in the figure 14.2 will find the area of enclosed by octagonal figure
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top surface of a raised platform is in the shape of a regular octagon as shown in the figure 14.2 will find the area of enclosed by octagonal figure
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= AREA OF ABCH + DEFG + CDGH
= [1/2(5+11)4] + [1/2(5+11)4] + (5x11)
= 32 + 32 + 55
= 119m²
AREA OF TRAPEZIUM
= 1/2(sum of parallel sides)(altitude)