Answer:
16
Explanation:
B/c the bigger triangle is a copy of the smaller we can say
8 / 12 = x / 8
then, solve for x
8(8/12) = x
(64 *3) 12 = x
192 /12 = x
16 = x
nice, the first answer looks good , then :P
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/ 12 = x / 8(8/12) = x