Which equation can be used to calculate the area of the shaded triangle in the figure below?

The figure consist of 1cm rectangle,3 unshaded and 1 shaded triangle.

Area of rectangle=8×6=48sq.cm

Area of triangle with base 4cm and height 5cm is

=

2

1

×4×5=10sq.cm

Area of triangle with base 3cm and height 6cm is

=

2

1

×3×6=9sq.cm

Area of triangle with base 2cm and height 8cm is

=

2

1

×2×8=8sq.cm

Area of shaded triangle=Area of rectangle−Area of unshaded triangle

Area of shaded triangle=48−(10+9+8)=48−27=21sq.cm

ou would have 12 of each