Exercising my Dilatation Brain on the iPad

Once upon a yesterday, a math teacher asked me if there was something she could use to teach dilatations on the iPad.

I said sure!

and then quickly looked up what the heck that was ( a math genius, I am not). First question: what is the difference between dilatation and dilation? Has the math language police dropped the ball on this one? Are they the same thing? Please oh please math genius people, could you clarify?

Not that I was going to let a small issue of semantics stop me, not I. I was going to figure out how to dilatate on the iPad if it killed me.

It almost did, but not because of the iPad thing. No, it is because I am a reluctant mather, which in a way made me a perfect guinea pig as my skill level is on par with a 14 year old.

So the first thing I did was go to the amazing programs other Math teacher has adapted to work on the iPad:

photo

 

I clicked on Transformations (I knew that much) and went straight for dilatations, skipping all the other steps. Yep. I’m cocky.

photo

 

Ummm.

I had no idea what to do, so I thought I would google a useful tutorial on my desktop ( I know. Cheating). But where was the center of dilation? How can I do anything without the freaking centre????

Could there be two ways of doing this dilatation thing? Oh no. What have I gotten myself into?

Then I remembered that Mr. Math teacher made helpful videos conveniently located at the bottom of the page (these are screenshots of the beginning and the end of the video):

photo

 

And the answer!

photo

 

But wait…You mean dilatation is just an intimidating word for making it bigger or smaller?  Like, you just have to multiply it by the second number there? I can do that!

So back to the exercises ( I got the first one wrong so I had to try again):

photoTake that dilatation! I totally kicked your butt! Now the only problem with this program is that there is no place to show your work- it is meant as an exercise tool for the students, as individual practice. Still, I am using an iPad, which means my calculations are only a photo away:

photo

 

Aren’t you glad I’m not your student?

I thought I would try the same thing on the free version of geometry pad just to have a comparison:

photo

 

Geometry pad allows you to save your work as an image or PDF as well as mail it.

Math teacher’s amazing programs are great for students to practice. It keeps a tally of how many problems they get right and how many they get wrong and also gives the answer when it isn’t correct. This is great for the kids who have grasped the concept and just need to practice it. Also, the video was super helpful, at least for me, who knew nothing about dilatation.

However, if you are a teacher who likes to see the process of your student even during their practice sheets, geometry pad is an option. The only problem is that the student will have to input the first triangle they need to dilatate as it is a blank graph. And it might be annoying to receive a lot of jpegs of problems…However, it could be a good option in terms of presenting the concept to the class…

In conclusion, here is my brain before dilatation:

small-brain-shanghai-homer-simpson

 

After dilatation:

big.brain.alien

 

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