Square diagonal

Calculate the length of the diagonal of the square with side a = 11 cm.

Correct answer:

d =  15.56 cm

Step-by-step explanation:

a=11 cm  d2 = a2 + a2 d2 = 2 a2  d=2 a=2 11=11 2=15.56 cm

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Showing 2 comments:
Math student
Why do you need to do
d squared = a squared + a squared

Dr Math
just  simple Pythagorean therorem

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