5. Calculate the side length in isosceles triangle

Calculate the value of $BC$ of an isosceles triangle $ABC$ if the length of $BM$ is 63.97 $mm$ and $AM$ is the altitude from the vertex $A$ to the base $BC$. Also, find the angle $∠AMC$.

 

 

The length of $BC$ is  $mm$.

[Note: Submit the value of $BC$ in a maximum of $2$ decimal places]

 

The measure of angle $∠AMC$ is $°$.