Respuesta :

A is [(8)^2 + (5)^2]
B is [(17)^2 - (12)^2] whole underroot

Hey!

Hope this helps...

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To solve this, we need to use the formula:

a^2 + b^2 = c^2


a = 12cm

b = ??

c = 17cm

12 + b = 17

b = 5