Answer:
shaded area = 372.115 m²
Explanation:
the shaded area is calculated as
area of outer Δ - area if inner Δ
area of outer =
bh ( b is the base and h the height )
=
× 35.4 × 32.3
= 17.7 × 32.3
= 571.71 m²
area of inner =
× 20.9 × 19.1
= 10.45 × 19.1
= 199.595 m²
then
shaded area = 571.71 - 199.595 = 372.115 m²