Question 283569
Use the Pythagorean theorem. Two sides are 8 and 8 and the hyptoneues can be found as
{{{a^2 + b^2 = c^2}}}
{{{8^2 + 8^2 = c^2}}}
{{{64+64 = c^2}}}
{{{2*64 = c^2}}}
{{{sqrt(2*64) = c}}}
{{{sqrt(2)*8 = c}}} 
{{{11.3 = c}}}