Question 269882
We use the Pythagorean theorem as
a^2 + b^2 = c^2
knowing a and c we get
{{{1.5^2 + b^2 = 2.5^2}}}
then
{{{2.25 + b^2 = 6.25}}}
subtracting we get
{{{b^2 = 4}}}
and a square root gives us
{{{b = 2}}}