Which of the following sets could not be the lengths of the sides of a triangle? {5, 6, 12} {5, 7, 10} {4, 4, 5} {4, 5, 5}

The set {5, 6, 12} cannot be the lengths of the sides of a triangle because of the smaller sides, 5 and 6, which sum up to 11, which is less than 12. Hope this helps!

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.