Question

Find ALL the missing sides and angles of this triangle.

12
40°
A
B
90°
60°
50°
:: 40*
20°
#: 5.3
12
:: 6.4
#: 7.7
:: 9.2
#: 3.6
#: 8.5

Answer 1

Explanation:

sin40°=
`(AC)/(12)`
⇒AC=sin40°×12

⇒AC=7.713≈7.7
cos40°=
`(AB)/(12)`
⇒AB=cos40°×12

⇒AB=9.192≈9.2

as A=90°,B=40°

from A+B+C=180°

we can write C=180°-90°-40°

⇒C=50°