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In addition to the rectangle, which is a four sided figure, a sketch allows us also to do polygons and circles, which have different numbers of sides. We can find those here, under Draw. We have Polygon and Circle. And you can also find them here. This is the Polygon tool, and this is the Circle tool. Now the reason I'm introducing these at the same time is that they're kind of related. Basically a polygon and a circle are the same thing, except the circle usually has more sides. So let me first off start with the Polygon tool.
When I click on this, you'll notice in the bottom right hand corner, it tells me how many sides are in this. And by default it gives you six sides, so we have a hexagon. Then I left click on this, and I can drag out that hexagon, and again I can snap to a different axis if I want. And then I can let go. And also in the bottom right hand corner, it tells me the radius. So, if I wanted to, I could change the radius, say, make it four feet. And now I have a four foot radius polygon.
Now if I wanted to, I could create another one, with a different number of sides, so if I go to my Select tool, and then reselect polygon, you see how it has number of sides at the bottom right hand corner. Let's go ahead and make that three sides, hit Enter, notice how this becomes a triangle. And now I can drag out my triangle, and if I deselect and re-select again, it will tell me number sides, let's make an octagon, make it eight sides, hit Enter. And then drag out an eight sided polygon and again, I can type in the radius if I want.
Let's say I had more and more sides on this, so let's for example type in 12 sides here. You'll notice that it starts to become more and more of a circle. So, you have a triangle with three sides, six, eight, 12, it starts to approach that of a circle and basically in SketchUp a circle is just a polygon with more sides, but also that has an additional thing that allows you to create smooth surfaces as you bring it into 3D. So actually I'm going to left-click and drag, and select all of this and hit Delete.
And let's go ahead and go to the Circle tool. So, when I go into Circle, again, I've got a number of sides. In this case it's 24. I can left click and drag and again I get my radius and there's my circle now if I want to draw another circle I can draw this so that this centre is coincident by snapping and then drawing this circle again. Now if I want, I can, just like with the Polygon tool, create a number of sides. So let's say I only wanted eight sides to my circle, I could create an eight sided circle.
Now that looks like an octagon. The big difference is that when you bring this into 3D, I'm going to show you a tool here called Push/Pull. What this does is it gives smooth sides. So if I were to create a polygon here, with eight sides, and push and pull that, you'll see that I have discreet sides here. So the big difference between a circle and a polygon, is that when you bring it into 3D, you're going to get smooth sides on the circle, and you're going to get faceted or angled sides on the polygon.
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