Does 52 degrees, 47 degrees, 81 degrees make a Obtuse? or Acute? or Right? Yes I know it's 180 but its asking me this...
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8 Answers to "Does 52 degrees, 47 degrees, 81 degrees make a Obtuse? or Acute? or Right? Yes I know it's 180 but its asking me this..."
Posted by benetal Nov 14th, 2012 at 5:19PM
Is this home work?
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Posted by majorlatency Oct 31st, 2012 at 1:45PM
Well that's easy, first for it to be a right angle one of the angles needs to be 90 degrees, so this is not a right angle...
An obtuse triangle is a triangle in which one of the angles is an obtuse angle. (Obviously, only a single angle in a triangle can be obtuse or it wouldn't be a triangle.) A triangle must be either obtuse, acute, or right.
From the law of cosines, for a triangle with side lengths a, b, and c,
cosC=(a^2+b^2-c^2)/(2ab),
(1)
with C the angle opposite side C. For an angle to be obtuse, cosC<0. Therefore, an obtuse triangle satisfies one of a^2+b^2<c^2, b^2+c^2<a^2, or c^2+a^20. Therefore, an acute triangle satisfies a^2+b^2>c^2, b^2+c^2>a^2, and c^2+a^2>b^2.
The smallest number of acute triangles into which an arbitrary obtuse triangle can be dissected is seven if B>90 degrees, B-A,B-C<90 degrees, and otherwise eight (Manheimer 1960, Gardner 1981, Wells 1991). A square can be dissected into as few as 9 acute triangles....
So to answer your question I'm b-u-g-g-e-r-e-d if I know.... Ask someone else my head hurts...
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Reply by benetal Nov 14th, 2012 at 5:18PM
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Posted by FordPrefect42 Oct 31st, 2012 at 1:44PM
None of the corners are greater than 89 degrees, so it's acute.
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Posted by daviesgirl Oct 31st, 2012 at 1:42PM
if it's 180 degrees.......... it's a straight line
0-less than 90 degrees is acute
90-180 degrees is obtuse
180-360 degrees is a reflex angle
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Posted by ambergris Oct 31st, 2012 at 1:40PM
Its rather cute of you to ask such an obtuse question, just to make sure you get it right
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Posted by MathMan789 Oct 31st, 2012 at 1:40PM
anything over 90 degrees is obtuse
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Reply by MathMan789 Oct 31st, 2012 at 1:43PM
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Posted by monkeysintheattic Oct 31st, 2012 at 1:38PM
Ok now I love you. LMFAO
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Posted by woodworkingjoe2002 Oct 31st, 2012 at 1:38PM
acute
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