Question
Which pair of lines are perpendicular? Give your answer in number. (Eg 1) 

(1) GH and HJ
(2) LK and FH
(3) LE and EF
1 m

Click button first when a symbol is required. X

Which pair of lines are perpendicular? Give your answer in number. (Eg 1) 

(1) GH and HJ
(2) LK and FH
(3) LE and EF