110 Étudier un phénomène périodique a. Deux bateaux partent de Marseille l'un tous les
7 jours, le second tous les 12 jours. Ils partent tous les
deux le 1er mars.
À quelle prochaine date partiront-ils tous les deux
ensemble de Marseille ?
b. Le 1er mars, un 3e bateau part également de Marseille.

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

what "following statement"?

step-by-step explanation:

the answer is b.

step-by-step explanation:

answer: idk wbu

step-by-step explanation: umm..