What aspects of lines have to be diffrent

If two lines are parallel, they are pretty much completely the same. I mean, the length can be different. You could have a millimeter long line below a infinite line, as long as they are going the exact same direction making them parallel. Also, I guess the thickness could be different haha.

Step-by-step explanation:

Hope it helps

30

step-by-step explanation:

times by times

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )