Question

6. Find the length of diagonal of a square with side 8cm.
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Answer 1

Answer:

11.28 cm

Step-by-step explanation:

each angle of a square is 90°

side = 8cm

We  use Pythagoras theorem

Let diagonal be 'x '

x²=8²+8²

x²=64+64

x²=128

x=$\sqrt{128}$

x = 8$\sqrt{2}$ cm

= 8 * 1.41

= 11.28 cm

Answer 2

Answer:

11.28cm

Step-by-step explanation:

each angle of a square is 90°

side = 8cm

We use Pythagoras theorem

Let diagonal be 'x '

x²=8²+8²

x²=64+64

x²=128

x=\sqrt{128}

128

x = 8\sqrt{2}

2

cm

= 8 * 1.41

= 11.28 cm