The lines mean that the number is going to become positive. |-178| will become positive meaning it will become= |178|
The answer is 180 i hope i helped you :)
Answer:
h = 1.403733341286
Step-by-step explanation:
17.
the triangle of sides ‘l’ and ‘l-h’ is a right angled triangle.
Then

Then

Then

18.
For l = 6 and θ = 40 :

= 6-6cos(40)
= 1.403733341286
The answer is (-2,3)
hope you have a great day ;)