So what we do is we draw an arrow.

If you started with this arrow leaves off, then you put this green arrow.

Offset pages until I can see the tool offsets

So let me just define some vector here, instead of making them bold, I'll just draw it with the arrow on top.

Shift Left Arrow and Shift Right Arrow

I draw a line from there to there.

Arrow

Arrows

An arrow

A arrow

So this is minus 4 times our vector v.

Continue rotating until the arm reaches the origin position, as shown on the screen

Show arrows

We are starting 15. Let me put 0 over here and we're starting with 15. 15 could be right over here.

If you put this arrow on top of this arrow or to the left of this arrow

AMS Arrows

Up Arrow

Arrow Shapes

A arrow shape

Right Arrow

A right arrow

Left Arrow

A left arrow

Top Arrow

A top arrow

Bottom Arrow

A bottom arrow

Rightwards Arrow Bullet

Align Right

So let's do that. Let's draw that.

One way to think about adding these numbers is as if you added these arrows.

So it's definitely going to a negative number. We can even think about the absolute value of that negative number. We can just visualize it.

Ctrl Up Arrow

Ctrl Down Arrow

Ctrl Left Arrow

Ctrl Right Arrow

Circular Arrow

A circular arrow

Left Down Arrow

A left down arrow

Left Top Arrow

A left top arrow

Right Down Arrow

A right down arrow

Right Top Arrow