Question

Use the diagram to determine the length of LJ

Answer 1

`\qquad\qquad\huge\underline{{\sf Answer}}`

Let's use distance formula ~

`\qquad \tt \dashrightarrow \:LJ = \sqrt{(x1 - x1) {}^(2) + (y2 - y1) {}^(2) }`

`\qquad \tt \dashrightarrow \:LJ = \sqrt{(0) {}^(2) + (y2 - y1) {}^(2) }`

`\qquad \tt \dashrightarrow \:LJ = \sqrt{ {}^{}(y2 - y1) {}^(2) }`

`\qquad \tt \dashrightarrow \:LJ = { {}^{}y2 - y1 {}^{} }`

I hope it was easy enough to understand, ask me if you have any doubts ~