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Which classification best represents a triangle with side lengths 6 cm, 10 cm, and 12 cm?

User Nandun
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So, the two smaller sides summed up are always larger than the longest side, so the second and fourth option are wrong.

Acute triangles have 3 degrees smaller than 90*, whereas obtuse triangles have one angle bigger than 90* (and therefore the other two are smaller than 90*).

Solution: obtuse

Consulting the image below you will find a way on how to calculate the angles for your triangle.

You will find that one angle is actually around 93* which is bigger than 90* therefore your triangle is obtuse

User Gul Ershad
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