1. L'engrenage rouge tourne et actionne l'engrenage vert.
L'engrenage rouge a 10 dents
et le vert a 20 dents.
a. Lorsque l'engrenage rouge
effectue 4 tours, combien de
tours effectue le vert?
b. Lorsque l'engrenage vert effectue 30 tours, combien
de tours effectue le rouge ?
2. On change le nombre de dents de chaque
engrenage. L'engrenage vert a 60 dents.
On remarque que lorsque l'engrenage vert effectue
10 tours, l'engrenage rouge a effectué 50 tours.
Combien de dents a l'engrenage rouge ?​

you would need to know all the numbers that are on there

step-by-step explanation:

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

this answer is !