Respuesta :

mhanifa

Answer:

  • 17 mm²

Step-by-step explanation:

An easy method is to subtract the areas of two rectangles, 5x4 and 3x1:

  • 5*4 - 3*1 =
  • 20 - 3 =
  • 17 mm²

Divide into two rectangle

In the below one

  • L=1+3=4mm
  • B=2mm

Area=4(2)=8mm^2

In above one

  • L=5-2=3mm
  • B=3mm

Area=3(3)=9mm^2

Total area

  • 9+8=17mm^2