Question

What do we call the space between chord and the circumference in a circle?

Answer 1

the space between chord and the circumference in a circle called as segment .

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Answer 2

CHORD
The diameter is twice the size of the radius. A line segment that has its endpoints on the circular border but does not pass through the midpoint is called a chord.
CIRCUMFERENCE
The distance around the outside of a circle is called the circumference.