Question

13. Top surface of a raised platform is in the shape of a
regular octagon as shown in adjoining figure.
Find the area of the octagonal surface. ​

Answer 1

Answer:

Area of Trapezium=21(Sum of parallel lines)×height

⇒Area of the octagonal surface ABCDEFGH

=Area(trap.ABCH)+Area(rect.HCDG)+Area(trap.GDEF)

=[21(5+11)×4+(11×5)+21(11+5)×4]m2

=(32+55+32)m2=119m2.

Step-by-step explanation:

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Answer 2

Hope it helps you.................