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

(1) GK and JK
(2) EF and EK
(3) FG and GK
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) GK and JK
(2) EF and EK
(3) FG and GK