no
Lines which lie on the same plane and have the same length are known as symmetry lines
In geometry, lines are of infinite length. So, yes, parallel lines have the same length. They are completely 'G' rated at all times. They never touch.
The service brake is the one which applies the brakes - the emergency brake system is the system which releases the spring brakes.
same as the old lines, just get straight brake line and bend it like the old as you go.
No. The first, second and fifth lines are of similar length whilst the third and fourth are of a similar, shorter length.
Congruent lines
Because they have the same length of lines and same angles.
no because an arrowhead has to long lines and to small lines
Parallel
If you mean the length of the day, yes - that is the same around the Earth. The Earth rotates as a rigid body. If by day length you mean hours of sunlight. On the same lines of latitude day length will be the same, but due to the wobble in the rotation of the earth, day length is different along lines of longitude.
The same way as you bleed any other brake system.
four lines