Square diagonal

Calculate the length of diagonal of the square with side a = 23 cm.


Correct result:

d =  32.53 cm

Solution:

a=23 cm  d2=a2+a2=232+232=1058 d=2⋅ a=2⋅ 23=23 2=32.53 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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