Stephan Schutt, Vanessa Jo, Quique Degenhart
Isabel Mendez and Guiselle Roesch

The circumference of a circle is the distance around
the outer part or a circle. It can also be called the area
of a circle.

The ratio (π= 3.14) of the circumference to the
Diameter is the same for all the circles.

The Circumference of a circle is πD or 2πR.
5 cm
C=πd
C=2πr
C=2(3.14 X 5) C=3.14 X D
C=31.4 cm. C=3.14X10
4 cm.
C=31.4 cm.
10 in.
C= 2πr
C= 2(3.14 x 10)
C= 62.8 in.
C=2πr
C=2(3.14 x 4)
C= 25.12 cm.

It is a side/part of the circumference of a
circle. The measure of the arc may be used
(in degrees) to find its length.
Arc

Is the ratio of the arc length to the whole
measurement of the circle, which is 360°

Arc length
2πr
m AB
360°
or you can also use:
A
Arc length of AB =
B
m AB
360°
360°
Arc length
2πr
m AB
360°
=
A
7
50°
P
X
2π7
X
B
X
43.96
=
=
50°
360°
50°
360°
43.96 x 50= m ÷ 360
X≈6.1
Arc length of AB= 52/360 x 2π(5)= 4.53
52 o 5 cm.
L
Arc length of IJ= 45/360 x 2π(6)= 4.71
500
M
6cm
45
Arc length of LM = 50/360 x 2π(7)= 6.10

Individualy solve the problems as soon as you
have the answer and come up to the board if
you have it right you will win a candy.