A square has 4 sides which are ALL equal.
so we would just do square root 20
=4.472
so I think a tenth would just be 4.5 ( rounded to 1d.p. )
hope this helped :)
Answer:
each piece is .75 ft long
A regular n-gon has n lines of symmetry
The angle of rotational symmetry for regular n-gon is 360 / n degrees.
We're told that
a. We want to find 
. By definition of conditional probability,
By the law of total probability,
Then
(the first equality is Bayes' theorem)
b. We want to find 
.
since 
.
