Question

Please help. passed due! find angle ABC.

Answer 1

so angle abd is 87°. than the equation look like this.

angle abc+ cbd =angle abd

9x -1°+6x+58°=87°

15x+57°=87°

15x=87° - 57°

15x=30°

30/15=x

x=2

angle abc=9x-1°

and 9x-1° equal to 9×2-1 = 18 - 1 = 17

Answer 2

ABC=17

Explanation: