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?