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### Course: Get ready for 8th grade > Unit 4

Lesson 2: Polygons on the coordinate plane- Drawing a quadrilateral on the coordinate plane example
- Drawing polygons with coordinates
- Area of a parallelogram on the coordinate plane
- Area and perimeter on the coordinate plane
- Coordinates of a missing vertex
- Example of shapes on a coordinate plane
- Dimensions of a rectangle from coordinates
- Coordinates of rectangle example
- Quadrilateral problems on the coordinate plane
- Quadrilateral problems on the coordinate plane
- Parallelogram on the coordinate plane

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# Example of shapes on a coordinate plane

Plotting points on a coordinate plane can help us draw shapes like rectangles! The points (1,1), (1,6), (9,6), and (9,1) form a rectangle. The x-coordinate tells us how far right to move, and the y-coordinate tells us how far up to go. The rectangle's height is the difference between the y-coordinates, which is 5.

## Want to join the conversation?

- I agree with Sushay,math may seem boring,but it can actually be useful,it helps you how to use money properly.

Imagine you are a tourist in a bazaar,

you only have 70 dollars in your wallet,then you see a curio shop called 'Acra Dacra's Magic Shop' where it sells strange magical items,the shopkeeper,Acra Dacra,shows you what he has for sale:

Magic Carpet 10$

Genie Lamp 20$

A Magical Ring that can turn you invisible every time you wear it but turns you into a creepy guy walking on fours eating raw fish for enternity 19$

Ruby Slippers 35$

Monkey Paw 45$

A Ballpoint Pen that can turn into a sword named Riptide 55$

If you buy one of his items,how much money will you have left?(7 votes)- I would have $50. As seen in Aladdin, their incorrect physics of when they flew on the magic carpet would make the air resistance instantly k!ll you, so I wouldn't buy that. The magical ring has obvious downsides, so I obviously wouldn't buy it, plus I don't react well with fish. I doubt the ruby slippers would be comfortable, assuming that the slippers are made entirely from ruby. I woudn't buy the monkey's paw because I do my research, and The Monkey's Paw (the book) is of the horror genre, and I'm pretty sure something bad would happen if I bought it. Lastly, I don't have use for a sword (or a pen, but only because I already have plenty good pens). If you take all of this information, it would only be logical to take the genie lamp.(4 votes)

- There are so few questions(8 votes)
- so if you were to have to solve the height without being able to look at the cordinate plane would you just take the larger number in that column and subtract it with the smaller one?(5 votes)
- Every time I watch this it says that I have not completed the assignment and wont let me rewatch it(3 votes)
- why is math so boring ngl(5 votes)
- Can a shape have more than 4 vertices and only 4 sides?(2 votes)
- A shape should have the same number of sides as vertex points. So, I don't think so. Imagine that you had to come up with the answer to it. Think of the shapes you know, and see if there are any more vertices than sides.(5 votes)

- I can help with At 1:1,1:2,1:3,1:4,1:5,1:6,1:7,1:8,1:9,1:10anything thing just ask ^^ :3(6 votes)
- Who Doesn't understand? I can help.(4 votes)
- i got confused at minute 1;01(2 votes)
- At minute1:01, Sal just described where the points were located at. That's not so important but can help to few.(4 votes)

- I tend to be good at math, but overall I'm struggling in this subject (Coordinate grids) and just to keep up with my Kahn academy. Can someone help me out?(2 votes)
- Hey Kennedy! I too struggle at math, and don't enjoy it. But you should try AI Tutoring... it can really help you! You could pay and use the one on Khan Academy, or you can you the one on Brainly for free. You should try it! Hope this helps! ✌︎ ♡ ☺︎ ☆(1 vote)

## Video transcript

- [Instructor] So we're
told here the four corners of a rectangle are located at the points one comma one, one comma
six, nine comma six, and nine comma one. Plot the four corners of the rectangle on the
coordinate plane below. And they gave us these four points and we can move 'em around with our mouse or our finger depending on what type of a computer we are using. And so let's just go point by point and plot the green points at those points. So the first one is one comma one. And remember the first
coordinate is our X coordinate. The second coordinate is our Y coordinate. So the first coordinate
tells us how far do we move to the right of the origin. So it's one, and then the second coordinate, the Y coordinate, tells us how far to move up from the origin. So that's also a one. So one comma one. The next point is one comma six. X coordinate is one. So we move one to the right of the origin, and then the Y coordinate is six. So we move six up and notice it's at the
intersection of the line, or it's at the intersection
of when Y equals six and X equals one. This is one comma six, all right. Now we have nine comma six. So let's see if we take our, if we have X equals nine right over there and Y is equal to six. So we'd go up six. So notice Y is now equal to six. And we have one last point
to plot, nine comma one. So when X is nine, Y is one. We go nine to the right, or
we're right above X equals nine. And then we go up one. This is nine comma one. And there you have it. We have the four corners of our rectangle. Then they say what is the
height of the rectangle? Well, if you imagine a
rectangle right over here, the height would be the
distance between that point and this point, or the distance between that point and that point. And so what is the distance
between these points? Let's see. They both have the same X coordinate and this one is at Y equals six. This is at Y equals one. So this is five higher than this one. So the height is five. And we could also count it. You could see one, two, three, four, five.