What will be the perimeter and the area of the rectangle below if it is enlarged using a scale factor of 2.5?



l l

6 cm l l

ll

8 cm

A. Perimeter = 38 cm, area = 89.25 cm²

B. Perimeter = 38 cm, area = 300 cm²

C. Perimeter = 70 cm, area = 89.25 cm²

D. Perimeter = 70 cm, area = 300 cm²

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

y=mx+