How long is BC? answer exactly, using radical if needed.

Question

asked Jun 27, 2021 141k views

2 Answers

Michael Prewecki · Answer 1 · 2021-06-29T23:42:42+0000

hello mate

This is neha to help you here

answer

since its a right traingle we can use trignometric ratos to solve this problem

<A= 30°

AB=4CM

AB IS THE HYPTONUESE OF THE TRAINGLE = 4CM

AND BC IS THE OPPOSITE SIDE OF ANGLE 30°

SO,

SIN30° =
(OPPOSITE SIDE)/(HYPOTENUSE)

$(1)/(2) = (x)/(4) \\\\CROSS MULTIPLYING\\\\2X= 4\\\\X= (4)/(2)\\ \\X= 2CM$

SO BC IS 2 CM LONGER