Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the
correct position in the answer box. Release your mouse button when the item is place. If you change your mind, drag
the item to the trashcan. Click the trashcan to clear all your answers,
Factor this expression completely and then place the factors in the proper location on the grid. Note: Place factors
alphabetically in the grid
ab + 4 + a + 4b

( B)  ∠OSN is the correct answer.

As we know two angles are Supplementary if sum of that two angles is 180° or they form a linear pair

The meaning of linear pair is that the two angles should be such that the non common arms should lie on opposite side of the common arm and at the point of intersection of two angles have the same vertex. Also the two non common arms should form a line.

SO IF ONE ∠ IS  Ф° OTHER SHOULD BE 180-Ф°. FOR EXAMPLE ON ∠ IS 60° OTHER WILL BE 180-60°=120°

Supplement of

1.45°=135°

2.70°=110°