Answer:
5 cm
Step-by-step explanation:
here's your solution
=> Diagonal = 13 cm. = D
=> length = 12 cm. = L
=> we need to find breadth = B
=> D^2 = L^2 + B^2
=> B^2 = D^2 - L^2
=> B^2 = 13^2 - 12^2
=> B^2 = 169 - 144
=> B^2 = 25
=> B = √25
=> B = 5
hence breadth = 5 cm
hope it helps