Creating scale drawings | Geometry | 7th grade | Khan Academy

2m read

·Nov 11, 2024

Sue is a software engineer. She wants to create a large-scale drawing of a processor inside a cell phone. The processor is a square chip, nine millimeters on each side. Draw the processor such that one unit on the grid below represents one half of a millimeter.

All right, so let's just think about these two worlds: you have the drawing and you have the chip in the real world. The drawing we're thinking in terms of these units here on this graph paper, so units. And the chip, we're thinking in terms of millimeters.

So we can set up a table here, and they tell us to draw it such that one unit represents half a millimeter. So one unit would represent one half of a millimeter. They tell us that the processor is nine millimeters on each side. So that is how many times as many millimeters?

Well, to go from one half to nine, you have to multiply by 18. So that's going to be 18 times as many units as well. So if I want to do a scale drawing right over here, it's going to be a square. It's a square chip, and since the scale is one unit, it represents half a millimeter; 18 units would represent nine millimeters.

And so I would want to do 18 units on a side. So, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18. So that would be the left side of the chip. Let me just see if I can draw a straight line there, just like that.

Then it would also be 18 wide, 18 units wide, representing 9 millimeters in the real world. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18. This is making my eyes hurt.

All right, so just like that. And then I could draw the other parts of it; it would be like that. And then I would just go straight down like that. And there you have it! I have drawn a scale drawing of our processor, and we are all done.

Worked example: estimating sin(0.4) using Lagrange error bound | AP Calculus BC | Khan Academy

Khan Academy Teacher Training 2018

View All

Pattern when dividing by tenths and hundredths

Let’s see if we can figure out what 2 divided by 0.1 or 1⁄10 is. Pause this video and see if you can figure that out. All right, now let’s work through it together. There are a couple of ways that we can approach it. One way is to think about everything …

We’re All Equal in Our Infinite Ignorance

Induction also says that prediction is the main reason for the existence of science, but it’s not; it’s explanation. You want an explanation of what’s going on, even if you can’t necessarily predict with any certainty what’s going to happen next. In fact,…

Article VI of the Constitution | National Constitution Center | Khan Academy

Hi, this is Kim from Khan Academy, and today I’m learning more about Article 6 of the US Constitution. Article 6 is, as we’ll soon see, kind of a constitutional grab bag. It covers debts, religious tests for office, and it establishes the Constitution as …

Shark Tank Secrets, Smart Money Moves, and My Real Relationship with Mark Cuban l Full Send Podcast

[Music] All right, we got another great episode. We got, uh, Kevin Oer in the house. Shows up in style, what, an hour and a half early, and crushes three happy dads right upon entrance. Two watches. Two watches! You got to have two watches, otherwise you…

Constructing a Reed Boat | The Great Human Race

A ton of energy goes into making this boat. All these reeds have to be cut, collected, carried, transported to here. All the cordage has been made, and now we have to take it and actually make the boat. All right, so I live here, and here, and you’re doi…

Held Captive by Qaddafi’s Troops in Libya: A Photographer’s Story | Nat Geo Live

In 2011, I wanted to cover the uprising in Libya. So, like so many journalists, we snuck in through Egypt. We knew that one of the great risks for us journalists was getting caught by Qaddafi’s forces. So, on March 15th, 2011, I was working with Tyler Hic…

Creating scale drawings | Geometry | 7th grade | Khan Academy

More Articles