dentify the correct justification for each step, given that m1=40 and m2=40 . The figure shows four rays with a common endpoint B. Rays B A and B C are opposite. They are directed horizontally to the left and to the right, respectively. Ray B E is directed to the upper left corner. Ray B D is directed to the upper right corner. Rays B A and B E form angle 1. Rays B D and B C form angle 2. Rays B E and B D form angle 3. 1. m1=40 , m2=40 2. m1+m3=mABD 3. 2 and ABD are supplementary 4. m2+mABD=180 5. m2+m1+m3=180 6. 40+40+m3=180 7. 80+m3=180 8. m3=100