desiree20000 desiree20000
  • 06-12-2018
  • Mathematics
contestada

can some one help me ‼ pleasee ‼

can some one help me pleasee class=

Respuesta :

Аноним Аноним
  • 06-12-2018

Answer:

12

Step-by-step explanation:

The 2 lines are equal in length. Therefore:-

ST = 21 - 9 = 12

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