Respuesta :

Answer:

15 + 12 + 7 + 8 = 42

8 + 15 = 23

12 - 7 = 5

23 + 5 = 28

42 + 28 = 70 mm

Answer: It is 70.

Step-by-step explanation: Once you add them all up. 15+12+7=8+5+23=70.

The length of the small missing side is 5. 12-7=5.  The length of the big missing side is 23, because 15+8=23. So the answer is 70

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