On considère un parallélogramme RSTU de centre 0. On note F, l'image du point S par la translation de
vecteur UT et E l'image de F par la translation de
vecteur RU.
1. Faire une figure.
2. À l'aide de propriétés vectorielles, démontrer que
RSET est un parallelogramme.

step-by-step explanation:

12475909

the answer is 489

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.