Question

What is the length of ab

Answer 1

Option A.
`√(53)`

Explanation:

In this figure side AB is a part of triangle formed diagonal of base of the box.

Side with length 1 unit and side AB.

Now we will calculate the length of diagonal of the base

=
`√(4^2+6^2)` [By Pythagoras theorem]

=
`√(16+36)`

=
`√(52)`

Now we apply Pythagoras Theorem again.

AB² = 1² + (
`√(52)`)²

= 1 + 52

= 53

AB =
`√(53)`

Option A is the answer.