Question 532382
AB is vertical because both points are on the line {{{x=1}}}.
AC is horizontal because both points are on the line {{{y=2}}}
The lengths of the segments are
{{{AB=10-2=8}}} and {{{AC=16-1=15}}}
ABC is a right triangle with leg lengths 8 and 15.
Its area is {{{8*15/2=60}}}