Question 43131
The distance between two points ({{{x[1]}}},{{{y[1]}}}) and ({{{x[2]}}},{{{y[2]}}}) is {{{sqrt((x[1]-x[2])^2 + (y[1]-y[2])^2)}}}.


Hence the distance between the given points is 
{{{sqrt((-10-(-1))^2 + (1-(-11))^2)}}}
= {{{sqrt((-10+1)^2 + (1+11)^2)}}}
= {{{sqrt((-9)^2 + 12^2)}}}
= {{{sqrt(81 + 144)}}}
= {{{sqrt(225)}}}
= {{{15}}}