No.
Measure your own and see!
False on two counts. A rectangular shape is 2-dimensional and so can have no mass. If it is rectangular but has length, width and height then it is a cuboid object. Then, multiplying the length width and height will give the volume, not the mass.
False
False
idk
True, only if all the sides are the same length.
True
true
True
You can head bang by listening to some heavy metal and shaking your head violently until your neck snaps back or you break it. That is when you know you are a true head banger.
Correct positioning of a headrest will reduce risk of neck injury or pain. This is true in a car as well as in a home recliner with a head rest.
It is true. A line segment has finite length but no width.
True
true
True
the axis of neck is z axis so this is a true answer.
true
No, in general that is not true. For two similar figures it is true. But you can easily design two different figures that have the same perimeters and different areas, or the same area and different perimeters. For example, two rectangles with a different length-to-width ratio.