Respuesta :

Answer:

The units of the two shapes are not the same one is in cm the other in mm

Step-by-step explanation:

1cm=10mm

15÷10=1.5cm

12÷10=1.2cm

1.2×1.5=1.8

72- area of B

Area of B  take away the area of A

72- 1.8

Answer=70.2cm

amna04352

Answer:

A) She did not covert them in the same unit before taking the difference

B) 72 - (180/100) = 70.2 cm²

Or,

(72×100) - 180 = 7020 mm²