Which angles in the picture are NOT supplementary? 2 and 3; 1 and 4
1 and 2; 2 and 3
1 and 3; 2 and 4
4 and 1; 3 and 4

1 and 3; 2 and 4

Step-by-step explanation:

Supplementary angles add up to 180 degrees, which is a straight line.

we can see that angles 2 and 3 make the / line, as do 1 and 4

1 and 2 make up the \ line, while, as mentioned above, 2 and 3 make /

4 and 1 is the same as 1 and 4 so they still create / and angles 3 and 4 make the \