The campsite shop sells boxes of funshine cereal. the base of each box is a 180 mm x 60 mm rectangle. the shelf where the boxes are displayed is a 65 cm x 35 cm rectangle.

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft