Question 522715: Please Help : The lengths of the sides of a triangle are 7cm, 12cm, 6cm. Is the triangle a right triangle, an acute triangle, or an obtuse triangle?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! The lengths of the sides of a triangle are 7cm, 12cm, 6cm. Is the triangle a right triangle, an acute triangle, or an obtuse triangle?
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Find the squares of the 3 sides, c^2 = 144, a^2 = 49 & b^2 = 36
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If c^2 = the sum of the other 2, it's a right triangle
If c^2 < the sum, it's acute.
If c^2 > the sum, it's obtuse.
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