degrees?
Concentric Circles
It is called the solar system
If a street has no outlet but has a circle at the end in which to turn cars around, the circle, or the whole street, is called a 'cul de sac'.
There were several. Probably the two most important were the compass and the sextant. Angle-measuring devices are named by the portion of a circle that they are. Early elevation measuring devices were primitive by comparison to modern ones, and w covered one quarter of a circle, and so they were called a "QUADRANT". Smaller ones used a mirror arrangement; they could be half the size without losing accuracy. These covered an eighth of a circle, and were called "OCTANTS", from the Latin "octo-" for "eighth". But these weren't big enough to measure high elevations, so they increased in size to cover a sixth of a circle (with the same mirror arrangement to double the angle) and were named for the Latin word for six, or "sextus"; this is the modern SEXTANT.
Great Circle
unit in earth science used for measuring angles in a circle or sphere?
a circle
The symbol is °C, in which the little circle is 'degrees' just like when measuring angles in degrees. The C is for Celsius.
The circumference of a circle with radius measuring 28cm is about 175.9cm (C = r x 2 x Pi).
Because the diameter is a straight line.
You may be looking for the Antarctic Circle, but all of the demarcations of latitude and longitude are circles.
An azimuth circle is a device used for measuring azimuths, a graduated circle on a sight, gun carriage, searchlight, etc.
Of a circle? It's the perimeter of the circle. Imagine putting measuring tape around a circle, the you would get a circumference
3,848.45mm2.
The radius of a circle is calculated by measuring the distance from the centre of the circle to any point (In a straight line) of the outside of the circle. (2 or 2 pi r) :)
18.84
It has a circumference of 333.01 feet.