The lines joining the two poles are longitudes.
Calculating the radius of a semicircle depends on what information about the semicircle is given.
A semicircle means a half circle.
A right angle triangle will fit into a semicircle.
The complete arc of a semicircle is 180 degrees
The lines joining the two poles are longitudes.
A Hemisphere
No, a semicircle is not a quadrilateral
Semicircle
The possessive form is semicircle's.
Calculating the radius of a semicircle depends on what information about the semicircle is given.
A semicircle means a half circle.
Semicircle has four syllables.
A semicircle has 180 degrees
"Meridian of longitude"
"Meridian of longitude"Your description of the line is interesting. Can you draw a line from north pole to south pole that does NOT form right angles with the equator ???
A right angle triangle will fit into a semicircle.