2. Q. What is an arc ?
A
B
Answer
An arc is a fraction
of the circumference.
minor arc
major arc

3. Q. Find the circumference of the circle .
Solution
C D
3.14 20C  
62.8C cm
10cm

4. 45
(3.14 12)
360
  
o
o
arc length
length 4.71arc cm
Arc length
πD
Central angle
360o
=
Q. What is the length of the minor arc XY below ?
6 cm
45
o
x
y
360
o
connection

5. 60
(3.14 18)
360
  
o
o
arc length
length 9.42arc cm
Arc length
πD
Central angle
360o
=
Q. What is the length of the minor arc AB below ?
9 cm
60
o
A
B
connection

6. 260
(3.14 20)
360
  
o
o
arc length
length 45.38arc cm
Arc length
πD
Central angle
360o
=
Q. What is the length of the major arc PQ below ?
10 m
100
o
A
B
connection
260
o

7. A
B
minor sector
major sector

8. Q. What is the area of the circle ?
Solution
2
A r
2
3.14 10A  
2
314A cm
10cm

9. 245
Area of Sector (3.14 6 )
360
  
o
o
2
Area Sector 14.14 cm
Area Sector
πr2
Central angle
360o
=
What is the area of the minor sector XY below ?
6 cm
45
o
x
y
360
o
connection

10. 260
Area Sector (3.14 9 )
360
  
o
o
2
Sector 42.41Area cm
Area Sector
πr2
Sector angle
360o
=
Q. What is the area of the minor sector AB below ?
9 cm
60
o
A
B
connection

11. 2260
Sector Area (3.14 10 )
360
  
o
o
2
Area Sector 226.89 cm
Sector Area
πr2
Central angle
360o
=
Q. What is the area of the major sector PQ below ?
10 m
100
o
A
B
connection
260
o

13. 7.07
360
(3.14 18)
 

o o
x
45
o o
x
Arc length
πD
Central angle
360o
=
Q. The arc length is 7.07cm. Find the angle xo
9 cm
x
o
A
B
connection

14. o
2
235.62
x 360
(3.14 10 )
 

o
o
x 270
o
Sector Area
πr2
Central angle
360o
=
Q. Find the angle given area of sector AB is 235.62cm2 ?
10 m
A
B
connection
x
o

15.  Retrieved from
https://www.google.com.ph/url?sa=t&rct=j&q=&esrc=s&source=web&c
d=2&cad=rja&ved=0CC4QFjAB&url=https%3A%2F%2Fmrmcfarlane.wi
kispaces.com%2Ffile%2Fview%2FCircle.ppt&ei=a_dKUqXLPMiWiAeE
t4HIBQ&usg=AFQjCNGbDDZoa7q3ckmyiIcYxpiS9l_U7A&bvm=bv.533
71865,d.aGc September 27, 2013