Question

top surface of a raised platform is in the shape of a regular octagon.Find the area enclosed by octagonal figure.​

Answer 1

Answer:

Area of Trapezium=

2

1

(Sum of parallel lines)×height

⇒Area of the octagonal surface ABCDEFGH

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

=[

2

1

(5+11)×4+(11×5)+

2

1

(11+5)×4

]m

2

=(32+55+32)m

2

=119m

2

.