Respuesta :

Answer:

9.9 or 10

Step-by-step explanation:

With a right triangle you can use the formula a^2+b^2=c^2

c is the missing side

7^2+7^2=c^2

49+49=c^2

98=c^2

9.899=c^2

Either round this to 9.9 or 10

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