Question 313440
the measure of the angles of a triangle are 2x + 10 , 3x , and 8x - 25,
the triangle is 
A obtuse B right C acute D equilateral E isosceles

in a triangle the sums of the angles must be 180

2x + 10 + 3x + 8x - 25 = 180 
(added angles together and set equal to 180, now need to solve for x)
13x - 15 = 180
13x = 195
x = 15
angles:
2x + 10 --> 40
     3x --> 45
8x - 25 --> 95
no angles equal to 90, no angles equal, largest angle greater than 90
the triangle is A obtuse