Answer:
155cm^2
Step-by-step explanation:
to find the area of the shaded region, find the area of the whole rectangle and the white triangle. then subtract them.
the total area of the rectangle:
A = Length * Width
A = 19 * 9
A = 171 cm^2
triangle area:
A = 1/2(base * height)
the base of the triangle is 19-11, which is 8
the width of the triangle is 9-5 which is 4
A = 1/2(8 * 4)
A = 16 cm^2
shaded region = rectangle - triangle
shaded region = 171-16 = 155cm^2
