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OpenStudy (anonymous):
If the angles of a triangle are represented by x, 3x+20, and 6x , the triangle must be a. obtuse b. right c. acute d. isosceles
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OpenStudy (p0sitr0n):
the sum of angles is 180. so, adding all the equations and = 180, solve them and you will get x. find the angles and see if there are any 90 degrees or similar angles.
OpenStudy (p0sitr0n):
\[x+3x+20+6x=180, x=16, other \angle=68, other =96.\] so i guess its a)
OpenStudy (anonymous):
yeah since the third angle is greater than 90 so its obtuse ? @P0sitr0n
OpenStudy (anonymous):
In a triangle if any angle is greater than 90 it is an obtuse triangle.
OpenStudy (p0sitr0n):
yes
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