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Which best explains whether a triangle with side lengths 2 in, 5in, and 4 in is an acute triangle

User Mini John
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for an acute angled triangle
a^2 < b^2 + c^2 where a is the longest side

so here we have:-

5^2 = 25

4^2 + 2^2 = 16 + 4 = 20

so 5^2 > 2^2 + 4^2 so this triangle is not acute. It is obtuse.


In summary

a^2 < b^2 + c^2 = acute angled

a^2 = b^2 + c^2 = right angled

a^2 > b^2 + c^2 = obtuse angled triangle.
User Marco Miltenburg
by
7.0k points

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