8 Korean variety show running man hosts lined up in two rows to take pictures together. Three people stand in the front row and five stand in the back row. If SoMin and SeChan must stand in the front row, KwangSoo must stand in the back row. How many arrangements there can be?

i’m here for points.

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.

might be the correct answer will be question number 2