What is the length of the hypotenuse in the right angled triangle to one decimal place? (a=5cm, b=4cm)

Step 1. Use the formula a²+b²=c²

Step 2. Square a and b to find a²⁼25 and b²=16

Step 3. Add a² and b² to find c²=41

Step 4. Find the square root of c² is sqrt(41)=6.403

Step 5. Round 6.403 to 6.4cm