The answer will depend on what is vibrating.
76.5 feet.
Infinite, feet is a length measurement, your asking for an area not a length
15--18 feet is "car length."
15.2 feet
yagi udda antenna has only one reflector...but it has many directors...depending upon gain and efficiency...the length of reflector is normally...more than one-half of wavelength... and directors have a length less than one-half of wavelength...
None, feet measure length.
The CB antenna is made for a limited band of frequencies and the VHF is a wide band antenna made for higher freqs. A CB antenna will not make a good tv antenna. A CB ant. is mounted on the vertical and tv ants. are mounted horiz. in the USA. VHF antennas are much smaller as they are for higher frequencies. Usually, they have many elements (rods) and will go from long in the back to short in the front. Certain CB antennas (beams) are mounted horizontally, but all of the elements are roughly the same length - and about twice as long as a VHF antenna. The elements on a horizontal CB antenna are roughly 18 feet from end to end.
20 linear feet would be "length", 3 feet would be width. To get square feet, multiply length by width.
Square feet is length x width and is given in square feet. Cubic feet is length x width x depth and is given in cubic feet.
length 269 feet width 240 feet height 180 feet
None. The 7 feet is a length and square feet is a measure of area.
273 sq. feet