Question

How long is DE?

Any help will be appreciated thank you

Answer 1

Answer: 4

Explanation:

solve for the missing angle

the total degrees a triangle can have is 180 so

`180-90-60=30`

use law of sines to solve for x

`(x)/(sin30) =(4√(3) )/(sin60)`

cross multiply

`sin60*x=4√(3) sin30`

divide by
`sin60`

`x=(4√(3)sin30 )/(sin60)`

type into calculator with (ALPHA Y= for a fraction on TI-84) MAKE SURE IT IS IN DEGREES