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

(1) LP and PN
(2) MN and NP
(3) LR and LP
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) LP and PN
(2) MN and NP
(3) LR and LP