Question

What’s the length of this missing leg?

Answer 1

b = 4.5 mm

Explanation:

using Pythagoras theorem:

a² + b² = c²

4² + b² = 6²

b² = 6² - 4²

b² = 36 - 16

b² = 20

b = √20

b = 4.5

Answer 2

Pythagoras theorem:

a² + b² = c²

4² + b² = 6²

b² = 6² - 4²

b² = 36 - 16

b² = 20

b =
`√(20)`

b = 4.5