Warm up #4 problems 41 thru 50

Doesn't #42 seem very similar to #19
http://mathyoucancounton.blogspot.com/2014/11/warm-up-2-problems-11-thru-20_13.html

(in #43) Notice that we are trying to find

a MULTIPLE of 101
that when ADDED to
a MULTIPLE of 19 
gives the SUM 2015.
Take a look at the MULTIPLES of 101.
Their PATTERN may help you get
 a partner that is a MULTIPLE of 19

If this question is too complicated,
then look at smaller squared arrangements:

4 dots gives ... squares
9 dots gives ... squares
etc.
OR WATCH THE SOLUTION (Click here!)

Graph the three points on the xy-plane.

The area FORMULA for a RIGHT TRIANGLE is

(1/2)(leg1)(leg2)

or use this crazy formula:

You may want to Pick a VALUE for X
and see what result it creates under the conditions of #50