This was inspired by an old UKMT question.
Algebra will work, but using intuitive reasoning provides a perhaps more elegant solution.
credit: @chrismcgrane84, UKMT
Perimeter Problem
This was inspired by an old UKMT question.
Algebra will work, but using intuitive reasoning provides a perhaps more elegant solution.
credit: @chrismcgrane84, UKMT
Starting Points Maths 