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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..."

1. Posted by Nov 14th, 2012 at 5:19PM

Is this home work?

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2. Posted by 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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3. Reply by Nov 14th, 2012 at 5:18PM

I,m not surprised

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4. Posted by Oct 31st, 2012 at 1:44PM

None of the corners are greater than 89 degrees, so it's acute.

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5. Posted by 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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6. Posted by 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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7. Posted by Oct 31st, 2012 at 1:40PM

anything over 90 degrees is obtuse

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8. Reply by Oct 31st, 2012 at 1:43PM

was this a triangle also? if so then it's acute

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9. Posted by Oct 31st, 2012 at 1:38PM

Ok now I love you. LMFAO

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10. Posted by Oct 31st, 2012 at 1:38PM

acute

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