13. The top surface of a pouch is in the shape of a rectangle LMNO with sides 9 cm and 6 cm.
(i) A zip is to be sewn along OH such that H is a point on LM and HM = 2 cm. Find the length of the zip.
(ii) A second zip is to be sewn along NK such that NK is the perpendicular from N to OH. Calculate the length of the second zip.
Hi anyone can help with (ii)???