Question 1114787
First Test,  {{{(7*sqrt(3))^2+21^2=(14*sqrt(3))^2}}};
Is this true or is this false?  This if true means that the angle made by the 21 unit and the {{{7*sqrt(3)}}} unit would be 90 degrees.


In case that were true, then next consider the ratio of  {{{7*sqrt(3)}}} to {{{14*sqrt(3)}}}.  What is it?  {{{1/2}}}?  What does that suggest to you?