Question

The top surface of a table is in the shape of a regular octagon as shown
in the adjoining figure. Find the area of the octagon.
​

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