Answer: 897
Step-by-step explanation: \frac{a}{\sin A}=\frac{b}{\sin B}
sinA
a
=
sinB
b
From reference sheet.
\text{Find other angle:}
Find other angle:
\angle X=180-139-20=21^{\circ}
∠X=180−139−20=21
∘
X
Y
Z
x = 940
z = ?
139°
20°
21°
\frac{z}{\sin 20}=\frac{940}{\sin 21}
sin20
z
=
sin21
940
Plug in. Opposite sides go together.
z=\frac{940\sin 20}{\sin 21} \approx 897.12 \approx 897
z=
sin21
940sin20
≈897.12≈897