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Answer:
12 cm , 19cm and 19 cm
Explanation:
if the measures of the sides of a triangle are a , b , c then
we must have c-a<b<a+c
(1) 19-12<19<19+12 acceptable
(2) 32-12>19 unacceptable
(3) 31-12=19 unacceptable
(4) 31-14>16 unacceptable
look at the photo below for more details.
:)