The hypotenuse of a right triangle with legs 6 cm and 8 cm is

1. Apply a^2 + b^2 = c^2 with a = 6, b = 8. 2. c^2 = 36 + 64 = 100. 3. c = sqrt(100) = 10. 4. So the hypotenuse is 10 cm. _Source: Selina Concise Mathematics Class 9, Ch on Pythagoras Theorem (Mistral OCR'd PDF), section on numerical example_