Answer:
Option (3)
Step-by-step explanation:
In a right triangle,
Cosine rule →
Sine rule → 
In the given triangle,
By cosine rule,


Or cos(h°) = z ÷ x
Therefore, Option (3) will be the answer.
I think 3.16 I said I think
Step-by-step explanation:
By sum of angles on a straight line = 180°,
we have Angle A + Angle B = 180°,
Angle C + Angle D = 180°, and
Angle E + Angle F = 180°.
Hence Angles A + B + C + D + E + F = (180°) + (180°) + (180°) = 540°.