Question 1072979: Is 1200,1600,2000 acute obtuse or right
Found 3 solutions by ikleyn, Alan3354, MathTherapy:
Answer by ikleyn(52795)   (Show Source):
Answer by Alan3354(69443)  (Show Source):
You can put this solution on YOUR website! Is 1200,1600,2000 acute obtuse or right
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Compare the squares of lengths.
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12^2 + 16^2 > 20^2 --> acute
12^2 + 16^2 = 20^2 --> right
12^2 + 16^2 < 20^2 --> obtuse
Answer by MathTherapy(10552)  (Show Source):
You can put this solution on YOUR website!
Is 1200,1600,2000 acute obtuse or right
Divide each length by 400. You'll get sides with a 3:4:5 ratio, which is referred to as a PYTHAGOREAN TRIPLE.
Hence, a right-angled triangle.
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