This is known as an 'arc'
An arc is a portion of the circumference of a circle.
Portion of the area of a circle is called a sector.
nope a portion of a circles area is a triangle
pi X radius squared X the percent of the circle.
A wedge shaped portion of a circle is called a sector.
An arc.
An arc (circumference only), or a segment.
Chord
A sector.
an arc
The phase that follows the new moon phase when it appears as a small outer portion of a circle is the waxing crescent phase. This phase occurs as the illuminated portion of the Moon gradually increases in size.
Waxing crescent is the phase that follows the new moon when it appears as a small outer portion of a circle.