The flag of Algeria seems to be fairly close to your description. The related link shows the Algerian flag.
This qn can't be answered because flag stones vary both as to thickness and as to density.
When half of the lighted side of the moon's surface can be seen, the moon looks like a half circle filled in. Any less than that, and the moon appears crescent-shaped. I suspect that you're not describing what you're imagining.
One half of 3 is one and a half, also written as 1.5 and 1 1/2.
The interval from A to Bb is a minor 2nd, also called a half step.
It is green, red, and black. With a half-moon shape or crescent in the middle.
the green half of the Saskatchewan flag represents the forest areas of the north..... written by a grade 5.
Half of the flag is red, the other half is green and it has a small star in the middle.
Green across the bottom half, white across the top half and a large Red Dragon placed at its centre
The Papal flag should be full staff
Half green on top right corner other half white
The welsh flag is green on the bottom half and white on the top half. A red dragon that faces to the left is placed in the centre of the flag. Please see the related link.
a half of a full moon
It is called a crescent, and if it is growing, it's called a waxing crescent, otherwise, it's a waning crescent. So, when less than half is facing the earth, it is called a Waning Cresent
There are two crescent moons. One is waxing crescent and the other in waning crescent. Waxing crescent is when less than half the moon is visible on the right side. Waning crescent is when less than half the moon is visible on the left side.
Liechtenstein's flag is blue in the top half and red in the bottom half. There is also a yellow/gold crown in the blue part.
Wales.Ans 2 - Wales has historically been regarded as part of England since 1535. The Welsh flag is white on upper half and green on lower half with a red dragon passant. This flag can be flown alongside the Union Flag, but not above it, in Wales.