It is the circle's radius
Half the diameter of a circle is called its radius.
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 line that cuts a circle in half is called a diameter. It passes through the center of the circle and divides it into two equal parts.
The diameter is the length across the middle of a circle. Half of the diameter is called the radius.
The Radius of a circle is half the Diameter of the circle.
radius
radius
Diameter. Half of the width is called the radius.
The diameter of the Earth is 12742 km or about 8000 miles.
Half the diameter of a circle called the semicircle
The diameter of a circle is twice the radius. A radius is half of a diameter.
Half a diameter is known as the radius.