That's roughly the latitude of the imaginary line called the "Tropic of Capricorn".
The latitudes half way between the equator and poles are at 60 N & S At these latitudes the circumference is half of that at the equator. The Earth's circumference at the Equator is approx. 24,000 miles. At latitudes 60 N & S the circumference is 12,000 miles. At the poles N & S, latitude 90 N & S, the circumference is '0' (zero) ; a dot point. Taking an angular value for half way at 45 o N & S , the circumference is approximately 17,000 miles.
It is called a frustum.
The half-life
semilunar valves are called semilunar because they look like half a moon. If something is not full in biology it is called 'semi' and lunar means the moon. So basicaly its called that because the valve looks like a half moon.
A line of longitude may also be known as a meridian.Meridians (lines of Longitude) are great circles that go round the Earth through the North and South Poles. So they represent one-half of a polar circumference of the planet.The Prime Meridian runs through England (Greenwich) and is 0 degrees longitude.
tropic of capricorn
The South Pole is at 90 degrees S latitude. The North Pole is at 90 degrees N latitude. All lines of longitude converge at both poles. There are 180 degrees of latitude between the North and South Poles, and 90 degrees of latitude between each pole and the Equator.
The Tropic of Cancer.
the Tropic Zone
That would be the 66.5° S parallel.
That's approximately the latitude of the Tropic of Capricorn, which is actually 23 degrees 26 minutes.
180, all the way from -90 at the south pole to +90 at the north pole.
The north pole is 90 degrees north latitude. The south pole is 90 degrees south latitude. When you travel from one pole to the other, you go through 180 degrees of latitude. Which isn't so surprising, since that trip takes you halfway around the world.
90. The whole sphere (pole to pole to pole) is 360.
The "tropical latitudes" are the latitudes within 23.5 degrees of the equator, both north and south of it. The half of the "tropics" between the equator and the Arctic Circle is the half between the equator and 23.5 degrees north latitude. The line at 23.5 degrees north latitude that marks the northern boundary of the tropics is the "Tropic of Cancer".
There are 90 degrees of latitude in each half of the globe.
That place is an enigma, wrapped in a mystery and signifying nothing. -- Longitude needs to be noted as either 'east' or 'west', otherwise it's not clear which half of the Earth it refers to. -- Latitude needs to be written as either 'north' or 'south', otherwise it's not clear which half of the Earth it refers to. -- No place on Earth has latitude greater than 90 degrees, either north or south.