Answer:
368.6 square units
Explanation:
this is a regular nine-sided polygon.
we now work out the area of the bottom triangle (the one with the lengths given).
area of triangle = 0.5 X 11.7 X 7 = 40.95.
with it being 9-sided, we multiply this figure by 9.
9 X 40.95 = 368.6 to nearest tenth