Find the area of the figure. round your answer to the nearest tenth.

a: 75km^2
b: 43.3km^2
c: 129.9 km^2
d: 65 km^2

D: 65 km²

Step-by-step explanation:

The formula for area of a hexagon when given the base is

A = (3/2)(√3)b²     where b is the length of the base

Here, b is given as 5, plug that in and simplify

A = (3/2)(√3)(5²)

       A =  (3/2)(√3)(25)

          A = (75√3)/2

              A ≈ 64.95 ≈ 65

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12