Answer:
width/shorter side = 3.5 cm
Step-by-step explanation:
p (perimeter) = 2w (width) + 2l (length)
24 = 2w + (2 x 8.5)
24 = 2w + 17 _(minus 17 from both sides)
7 = 2w _(divide both sides by 2)
3.5 = w
