PARTS OF A CIRCLE
The midpoint of a circle is
center
The line drawn from the center to the edge of a circle is …
Radius(r)
The line drawn from one edge through the center to another edge of a circle is …
Diameter (d)
The diameter cuts the circle in half!
d = 2 * r or r = d/2
��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 center of the circle is the diameter.
��A segment, part of the circle is called an ...�
a
r
C
Parts of the Circle
center
Radius(r)
Diameter(d)
chord
arc
The outside of the circle is called
Circumference
The perimeter of a circle is called circumference.
C = 2 * π * r
or
C = π * d
π = 3.14
Twinkle - Twinkle little star, Circumference is 2πr
The inside space of the circle is called
Area (A)
A = π * r2
π = 3.14