Question

I NEED HELP ASAP IM STRESSJNG OUT

Answer 1

A

Explanation:

Using the Sine rule in Δ ABC

∠ B = 180° - (30 + 50)° = 180° - 80° = 100° ( sum of angles in triangle ) , then

`(13)/(sin100)` =
`(BC)/(sin30)` ( cross- multiply )

BC × sin100° = 13 × sin30° ( divide both sides by sin100° )

BC =
`(13sin30)/(sin100)` ≈ 6.6 ( to the nearest tenth )