Question

Does anyone know this?

Answer 1

BC = 10.24

Explanation:

You can use the Pythagoras theorem for this question

`a^(2)` +
`b^(2)` =
`c^(2)`

a = 8cm

b = ???

c = 13cm

We will solve for B (length BC)

`a^(2)` +
`b^(2)` =
`c^(2)`

`8^(2)` +
`b^(2)` =
`13^(2)`

Rearrange for b

`b^(2)` =
`13^(2)` -
`8^(2)`

`b^(2)` = 105

b =
`√(105)`

b = 10.24