in triangle def, m

Question

in triangle def, m<d=3x+5, m<e=4x-15, and m<f=2x+10 which statement is true (the numbers i got were 65, 65, 50 did i something wrong)

df=fe
de=fe
m<e=m<f
M<d=m<f

campbell_st · Answer

well you need to solve for x

angle sum of a triangle is 180 degrees

so 3x + 5 + 4x -15 + 2x + 10 = 180

or 9x = 180

solve for x... find the size of each angle then look at the statements

anonymous · Answer

i looked it up on google and some had asked this same question and they said non of the statements matched, is that right, cause non look like they match to me

campbell_st · Answer

well what is the value of x...?

anonymous · Answer

20

campbell_st · Answer

so the angles are 3 x 20 + 5 = 65
                              4 x 20 -15 = 65
                              2 x 20 + 10 = 50

the angle is isosceles angle D and angle E are equal |dw:1338360471074:dw|

looks loike DF and EF are equal in length as there are opposite the equal angles