Maselam means in arabic: Good bye. A maselam arc could be a gate, through which people levae a special city. Cheers, Norbert
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Literally it means "With Peace," Ma meaning "with" and Salam meaning "Peace." It is commonly used as a Farewell or Goodbye, as in "Go in peace." It can be shortened colloquially to just "salam" or stated more formally as "Masalama."
It just means length.
The area within a circle enclosed by a chord and an arc
an arc is a segment of a circle. If the arc subtends a full angle of 360 degrees, then the arc is a circle; but this is a special case of an arc.
Arc measure is the number of radians. Two similar arcs could have the same arc measure. Arc length is particular to the individual arc. One must consider the radius of the arc in question then multiply the arc measure (in radians) times the radius to get the length.