>> This is the tutorial for the first part of lab 2.
We're going to create this drawing on the left side
in the actual scale and units and material.
But, we're going to start with imperial.
OK? And I'm going to turn on both the grid and snap
and I will rely on grid and snap
to easily construct the geometry shown.
So I'm going to start with the first drawing here.
With a line -- line command.
And then add to the horizontal line would be three
vertical lines.
And then I'm relying on the snaps
to create, easily, the drawings.
That's the first drawing, the upper part.
Then we're going to do the second drawing using the line
command again.
Here's the left side using the snap and the grid.
And here's the middle part using the line command again.
And then repeat the line command again.
OK? That's the second drawing.
Then you're going to do the third drawing.
I'm going to start with the circle in the middle.
I'll just indicate the center here
and radius equal to 2 grid units.
And then the left circle I'm going to use this
as the center right here and then 1 grid unit is the radius.
Then the right circle center here
and 1 grid unit as the radius.
And then, finally, at the bottom -- oh, before I do that,
I need to do the 2 horizontal lines by using tangent.
Tangent. Tangent.
Tangent. Take note I made sure the setting has tangent
for object snap.
And then finally the bottom line command again.
And then just complete the geometry shown
by indicating a series of points.
And that's my left drawing.
And all I need to do is now copy this using the lasso.
OK. Take note that I missed one of the lines
so I'll just click on that line,
to include in my clip board and then press enter
and then base point, I just select the origin and then I put
that origin for the second base point somewhere
on the right side.
Now I have two copies.
Finish the copying.
Now we're going to start editing the upper part
by the trim command.
Select trim and then boundary edges.
or cutting edges will be horizontal.
And then click on the part the vertical line you want
to trim away.
And then extend boundaries we extend will be the two vertical
lines on the left and on the right.
Press enter.
And then lines to extend, just start clicking
on the lines you want to extend.
So this extend night trim commands work similarly.
You select the boundaries first before you select the object you
want to trim or extend.
Now for the third drawing, trim again.
Trim and my boundary.
Select the boundary for the two horizontal lines.
Press enter.
And then now select the parts of the objects you want to trim
by clicking on the circles.
And then, another trim.
This time the boundaries will be the arcs from the big circles.
Press enter and then select the lines you want to trim.
And then, finally, we use the mirror command.
We select -- we can either do a lasso or a window
or just simply select each of the lines.
And then, after completing the selection, you press enter.
And then it wants you to indicate a line of symmetry.
So you just do a vertical line for symmetry and then press no
because you don't want to deal with the original.
And then we're done.