IT'S REALLY SIMPLE
first you have to know the normal area of a circle which is A=πr2 (squared)
then you just have to divide this by 2
so.. you just have to find the area then divide your answer by 2.
divide it by three, tha area
-6
The radius is half the diameter.
YES, if they have the same radius.
The circle's diameter
divide it by three, tha area
-6
Its diameter
yes * * * * * No, they do not tessellate.
The radius is half the diameter.
YES, if they have the same radius.
The direction of motion.
The circle's diameter
the cold front
the direction of motion i think
"Oval" is an imprecise term. It could be an ellipse, where the shape has a curved boundary all the way round or it could be like a running track: two semicircles with straight line segments joining them. The formula for the area will be different.
It would divide the circle into two semicircles.