Respuesta :

kristine275

Answer:

B

Step-by-step explanation:

  1. divide the given polygon into two (a square and a trapezium
  2. area of trapezium=1/2(a+b)×b 1/2(12+6)×12 ans 108square unit
  3. area of a square=s×s 12×12 =144square unit
  4. add 108+144=252square unit