00:01
All right, in this one, you have three gears.
00:05
I've drawn the triangle from those three gears, and they want you to find theta, angle theta.
00:14
And this may seem really straightforward, but theta, where i got 4 .3 is the radius of that top gear plus the radius of this middle gear.
00:24
If you add those together, you get 4 .3.
00:27
Same thing with the middle.
00:28
And that bottom gear, if you add those together, you get 5 .2, right? but if you look at this, you cannot do that for this third side to find theta, to set up your proportions.
00:42
You can't find this side because those gears don't match, so you can't do some adding of the radii of the gears to find that...