A quadrant.
The radius is half of the diameter of a circle.
The Line that divides the earth into two is called the great circle
The radius of a circle is one half of the circle's diameter, any line going from the center of the circle to the circle itself. A line connecting other points on a circle (or on any curve) is called a chord.
The area of any circle is (pi) x (radius)2 .The area of half the circle is just half of that number.
a hemisphere
Half a circle is called a semi-circle. Sometimes it is called a half-moon.
Half a circle is called a "semicircle" in geometry.
semicircleA half circle is called a semicircle.Half a circle is a semi-circle
The semi-circle ruler is commonly known as a protractor. A protractor is a geometric tool used to measure and draw angles. It typically has a half-circle shape with degree markings along the curved edge.
Semi = half
Half the diameter of a circle is called its radius.
A semi-circle
half of the radius the radius is half of the diameter the diameter is the with of the circle. This also can be called a quadrent circle.
A semi-circle
Half a circle is called a semicircle
A semicircle