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Pythagoras type maths problem

(27 Posts)
GooseyLoosey Mon 21-Jan-13 08:46:54

Can you help me understand ds's (Yr 5) maths homework.

It started off really easy - draw 7 squares, starting with sides of 1 cm and going up to 7 cm. Measure the diagonal.

Then it asked, what can you work out about the relationship of the length of the sides to the length of the diagonal? Can you explain this?

OK, so the lengths of the sides and diagonals are roughly as follows (rounding a bit):

1cm - 1.4cm
2cm - 2.8cm
3cm - 4.2cm
4cm - 5.6cm
5cm - 7cm

Right - we could work out the relationship between the lengths -

diagonal = length of the side + (length of the side x 0.4).

Why though? How to explain this? Can you help Oh wise ones?

solidfoundation Wed 30-Jan-13 17:42:39

Senua, you are not sad at all. Maths is a great subject and if you did not fully appreciate that at school, now's your chance to catch up. Maths is all around us, so a good understanding of the subject is necessary to understand the world. Enjoy learning with your children. They will appreciate that.

GrahamL Wed 27-Feb-13 15:26:46

brilliant conversation here, more please more. It is not sad to help each other with maths. I am an ex maths teacher and now maths author, can't say what of for obvious reasons BUT this sort of helpful support is a great thing for learning maths, thanks all

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