Question

There is a regular octagonal park. Find the surface area of the park (in $m^2$ ).

• A. 119
• B. $=234m^2$
• C. $=120m^2$
• D. $=219m^2$

Answer 1

The correct option is A

119

Split it into two trapeziums and a rectangle by joining vertices as shown below:

$AreaofOctagon=(2\times Areaoftrapezium)+Areaofrectangle$

$=2\times [\frac{1}{2}\times (5+11)\times 4]+5\times 11$

$=119m^2$