Question

The legs of a right triangle have lengths of 4 and 5 units. Find the length of the hypotenuse.

Answer 1

Use Pythagorus' Theorem: \[c^2 = a^2+b^2\]
Where c is the hypotenuse and a and b are the legs.
You should end up with \[c^2 = 16+25\] Adding and taking the square root of both sides you get \[c = 6.40 \]

Answer 2

i think grey is using british notation :)

Answer 3

\[\sqrt{41}\]

Answer 4

sorry >_<

Answer 5

sqrt(41) looks good to me