The document defines key terms related to circles, including circumference, which is the distance around the circle; center/centre, which is the midpoint of a circle; radius, which is the line from the center to the circumference; diameter, which cuts the circle in half by going through the center; and chord, which connects two points on the edge of a circle. An arc is a segment or part of the circumference of a circle.

2. The outside of the circle is called
circumference
The circumference is the distance around the
circle.

3. The midpoint of a circle is
centre

4. The line drawn from the centre to
the circumference is …
radius

5. The line drawn from one circumference through
the centre to another circumference is …
radius
diameter
The diameter cuts the circle in half!

6. A line that connects one point on the edge of
the circle with another point on the circle is
called ….
chord
The chord that passes through the
centre of the circle is the diameter.

7. A segment ie. part of the
circumference of the circle is called
an ...
a r
c

8. Parts of the Circle
centre
radius
diameter
chord
arc