Drawing a quadrilateral on the coordinate plane example
About this video
The video builds a quadrilateral (a four-sided figure) on the coordinate plane by placing vertices at (0, 9), (0, -7), (8, -7) and (8, 0). It then connects the line segments so the sides meet at those vertices.
You'll be able to
- plot vertices given as coordinates, including points on an axis.
- connect vertices to draw a quadrilateral.
- explain what a vertex of a shape is.
Key words
- quadrilateral
- A flat shape with four straight sides.
- vertex
- A corner of a shape, where two sides meet. The plural is vertices.
- line segment
- A straight piece of a line with two endpoints.
Transcript
- [Instructor] Use the line segments below to create a quadrilateral, so a four-sided figure, with vertices at the following points. So they give us four coordinates right over here. So those have to be where the sides of our quadrilateral intersect. So one is at the point 0,9.
So our x-coordinate is 0, so we're at 0, and then our y-coordinate or our vertical coordinate is 9. So we have to have, we need to have a vertex right over here. Now the next one is at 0,-7. So 0,-7. So lemme just put something here. We can later rearrange it to see what actually makes sense.
Then we have 8,-7. So 8,-7. 8,-7 is right over here. It feels like this might be the right edge. So I'll put its other point right at 8,-7. And then finally, 8,0. 8,0. Well, 8,0 is right over here. So it looks like I have a point on every one of the vertices. So now I just have to connect to these two and I'll have a four-sided figure.
So let me take this there, bring this one over, and then let me move this one up, and then bring this one down, and there you have it. I think I've got my quadrilateral.
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