Hi

Note: If a, b and c are the lengths of the sides of a triangle and c is the largest side, then

(1) a^2 + b^2 = c^2 => right triangle

(2) a^2 + b^2 > c^2 => acute-angled

(3) a^2 + b^2 < c^2 => obtuse-angled

Classify the triangle based on side lengths 4, 6 and 7

 4^2 + 6^2 > 7^2   Acute-angled Triangle 

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