Question

Find the area of given octagon.
1
A
5 m
H
5 m
4 m
5 m
B.
11 m
G
5 m
С C
F
D
E
these are the sides of octagon and there measures​

Answer 1

Answer:

AP=4 cm

All sides =5 cm

HC=GD=11 cm

Area of trapezium ABCH

=Area of trapezium GDEF

Area of a trapezium =

2

1

(a+b)h

$$=\dfrac{1}{2}(5+11)\times 4$

=32 cm

2

So Area of trapezium GDEF=32 cm

2

Area of rectangle MCDG=l×b=11×5=58 cm

2

Area of Octagon = Area of two trapezium + Area of rectangle

22×32+55

=64+55=119 cm

2

Step-by-step explanation:

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