Bell Ringer 8A
1.
A triangle has sides of lengths 10, 12, and 16. Classify the triangle.
A. Acute
C. Obtuse
B. Right
D. Not a triangle
2.
Classify the triangle with side lengths of 8, 15, and 17.
A. Acute
C. Obtuse
B. Right
D. Not a triangle
3.
and
In the diagram at the right,
does a secant line intersect a circle?
4.
A tangent line is a line in the plane of a circle that intersects the circle in ________ point(s).
5.
A circle has a radius of 4 m. What is the exact length of its circumference in meters?
Hint: Any time a problem ask for exact measurements you will not round. Therefore, this problem wants you to leave
in your final answer.
are secant lines, and
is a tangent line. How many times
Bell Ringer 8B
1.
Suppose that the points A, B, C, and D, in that order, are on the same circle and
degrees?
2.
An inscribed angle has measure
3.
Suppose that points A, B, and C are on the same circle and that measure of arc AB is
4.
An angle inscribed in a circle has measure
of x?
!"
A.
#
B. 15
#
C. !"
What is the value of x?
2.
If
$%
in
. What is the measure of its intercepted arc in degrees?
Bell Ringer 8C
1.
. What is
, what is the value of x?
. Its intercepted arc has measure
D. 11
E. 30
. What is
in degrees?
. What is the value
3.
A chord of length 8 is 3 feet away from the center of the circle. What is the length of the radius of the circle, to the
nearest tenth?
A. 7.4
C. 6.3
B. 5.0
D. 8.5
Bell Ringer 8D
1.
Phil created a design with a circle inscribed in a triangle. What is the relationship between any one side of the triangle
and the circle?
A. The side is a radius of the circle.
C. The side is a tangent of the circle.
B. The side is a chord of the circle.
D. The side is a secant of the circle.
2.
What is the value of x in ⊙O?
A. 25
B. 35
C. 45
D. 65
What is the value of the variable?
A.
B. 140
C. 70
D. 110
3.
4.
In the diagram, RT is tangent to the circle at S. If the measure of Arc SVU is
A.
C. 318
B. 69
D. 42
5.
What is the value of g?
A. 124
B. 86
, what is
&'(
C. 43
D. 4.2
Bell Ringer 8E
1.
Suppose that R and T are points on a circle and that S is a point exterior to the circle. Suppose also that SR and ST are
tangent to the circle. If SR=8, what is ST?
2.
Suppose that points A, B, C, and D, in that order, are on the same circle. Suppose also that AC intersects BD at the point
E. If BE=2, DE=3, and AE=1, then what is AC?
3.
What is the area of a circle with a diameter of 16 cm?
A.
cm2
C.
B.
cm2
D.
cm2
cm2
4.
5.
Find the circumference of a circle whose radius is 8 inches.
A.
in
C.
B.
in
D.
in
in
Find the value of the variable. If the answer is not a whole number, round to the nearest tenth.
A. 9
C. 6.2
B. 8
D. 22.5
Bell Ringer 8F
1.
What is the circumference of a circle whose radius is 9 cm?
+
A.
cm
D.
cm
,B. * cm
E.
cm
C.
cm
2.
For a circle of radius 4 ft., find the arc length of a central angle of 60°. Hint: The arc length is PART of the
circumference.
.
A.
ft.
ft.
C.
#
B.
ft.
/
D.
ft.
#
3.
Find the area of a circle whose radius is 9 cm.
A.
cm2
B. * cm2
C.
cm2
D.
+
,-
E.
cm2
cm2
4.
For a circle of radius 4 ft., find the area of a sector with a central angle of 60°. Hint: The arc length is PART of the area.
.
A.
ft2
ft2
C.
#
2
B.
ft
/
ft2
D.
5.
The circumference of a plate is 84.5 cm. To the nearest hundredth, what is the plate's diameter? Approximate with π =
3.14.
A. 5.19 cm
C. 13.46 cm
B. 10.38 cm
D. 26.91 cm
#
Bell Ringer 8G
1.
For a circle with radius 8 ft., find the arc length subtended by a central angle of 30°
A.
ft
C.
ft
/
.B.
ft
ft.
D.
#
2.
#
The diameter of one circular garden is 20feet. The diameter of another circular garden is 10 feet. How much smaller is
the circumference of the smaller garden? Use π = 3.14.
A.
.4 feet
C.
2 feet
B.
2 feet
D. * 2 feet
3.
What is m∠C?
A. *
B.
C.
D.
4.
A bicycle tire has a diameter of 17 in. About how many revolutions of the tire are necessary to travel 800 ft?
5.
Phil created a design with a circle inscribed in a triangle. What is the relationship between any one side of the triangle
and the circle?
A. The side is a radius of the circle.
C. The side is a tangent of the circle.
B. The side is a chord of the circle.
D. The side is a secant of the circle.
Bell Ringer 8H
1.
The diameter of a skateboard wheel is 60 mm. What is the circumference of the skateboard wheel to the nearest
millimeter? Use π = 3.14.
A.
mm
C.
mm
B.
mm
D. 5652 mm
2.
What can you NOT conclude from the diagram at the right?
A.
C. 5
B. ! 3 ! 4 !
D. 3
3.
If
4.
What is the value of y in ⊙O?
A. 20
B. 30
5.
and the measure of arc AE
If BC = 6, DC = 5, and CE = 12, find AC.
4
, what is the measure of arc BD?
C. 50
D. 60