**When we did our Sled Kite project it involved maths: measuring, working with percentages and ratios. However, it was a maths lesson they didn't mind if it meant they ended up with a kite. With this in mind, I thought I would look into all the maths I could think of that relate to kite making! So here goes...**

**How to work out the measurements for your kite if you want to make a different size kite:**

*If you look at the photo below it should help you understand what I mean when I say:*

*The 25cm in our template is the height of our kite, we will use as our 100% mark.*

*The two bits at the top and the line across the bottom ( all of which are 7.5cm in the original template) is 30% of the 25cm (100% of your kite's height)*

*Then you have 10% up the top left side*

*28% up the top right side. Like this...*

*You could ask the children to work out the other sides as ratios and fractions if you like.**Once you have done this you will see that you have drawn lines that you don't know the exact measurements too.*

*Of course you could use a ruler but, as they make right angle triangles, you could also have a go at pythagoras' theorem.*

All you have to remember is a

^{2 }+ b^{2}= c^{2}^{}

C is known as the hypotheses

So for the triangle below we have 2

^{2}+ 6^{2}= c^{2}

*Which is*2

^{2}+ 6

^{2}= 6.324

^{2}

Because 2

^{2}= 4 and 6

^{2}= 36 √40 = 6.324

You can measure it with a ruler afterwards to see if you're right.

Then there is the

**Geometry**of the kite.
What sort of shape is the template?

*An irregular pentagon.*

What shape is the sail of the kite?

*An irregular heptagon.**Draw it out as*

*vectors.*A vector is a set of instructions for moving from one point to another in three dimensions. A line which has both magnitude and direction can represent this vector.

**Trigonometry****is another thing that you can try when flying any kite - kite flying makes trigonometry super fun! It is something I am going to introduce my girls to when we do our next kite flying activity!**

If you want to make your own Sled kite Click

If you want to make your own Sled kite Click

**here.**
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ReplyDeletec is actually the hypotenuse not the hypotheses. those are two completely differnt things. but i knew what you meant :)

ReplyDeletec is actually the hypotenuse not the hypotheses. those are two completely differnt things. but i knew what you meant :)

ReplyDelete