Answer:
48 cm²
Explanation:
shaded area = area of rectangle - area of triangle
area of rectangle = 7 × 8 = 56 cm²
area of triangle =
bh ( b is the base and h the height )
Here b = 7 - 3 = 4 cm and h = 8 - 4 = 4 cm
area of triangle =
× 4 × 4 = 2 × 4 = 8 cm²
Then
shaded area = 56 - 8 = 48 cm²