Question

In triangle ABC, m 12 years ago

Answer 1

m<A means measurement of angle A?

Answer 2

m<A+m<B+m<C=180
so, x^2+12+11x+5+13x-17=180
or,x^2+24x-180=0
or,(x+30)(x-6)=0
x=6,-30
x cannot be negative in this case.
so, x=6
now put the values of x in A,B,C and find out out which angle is greatest. the side opposite to greatest angle has greatest length.
for example, if m<A is greatest, side BC is greatest

Answer 3

side AC? m<B = 71?

Answer 4

yes, exactly!

Answer 5

Thanks.