Chapter: Pythagoras Theorem· Mathematics Part 2 (Geometry)
Answer: 37 cm
Each angle of a rectangle is 90°, so the diagonal is the hypotenuse of a right-angled triangle with sides 35 cm and 12 cm.
\((\text{diagonal})^2 = 35^2 + 12^2 = 1225 + 144 = 1369\) \(\therefore\) diagonal \(= \sqrt{1369} = 37\) cm.