Unit 4A Part 2
Name:__________________
7.5B
1)
The radius of a circular clock face is 13 centimeters. Which expression can be used to find the
circumference of the clock face in centimeters?
F.
G.
H.
J.
2)
Information about three circles is listed below.
 Circle P has a diameter of 26 cm.
 Circle Q has a diameter of 52 cm.
 Circle R has a radius of 52 cm.
Based on this information, which statement is true?
F. The diameter of circle P is the same length as the diameter of circle R.
G. The radius of circle P is the same length as the radius of circle Q.
H. The diameter of circle P is the same length as the radius of circle Q.
J. The radius of circle P is the same length as the diameter of circle R.
3)
In the figure below, the vertices of triangle RST are on a circle.
 Line segment TS contains the center of the circle.
 The perimeter of triangle RST is 24 inches.
What is the circle’s radius?
F. 8 inches, because
and
G. 32 inches, because
and
H. 20 inches, because
and
J. 5 inches, because
and
4)
The circular opening of a tunnel has a circumference of 36 meters. Which equation can be used
to find d, the diameter of the tunnel opening in meters?
A.
C.
B.
5)
D.
Yasir drilled a circular hole that had a diameter of 8 millimeters. Which equation can be used to
find r, the radius of the circular hole in millimeters?
F.
H.
G.
J.
Unit 4A Part 2
6)
Name:__________________
Line segment NM passes through the center of the circle shown on the coordinate grid below.
Which equation can be used to find C, the circumference of the circle in units?
H.
F.
G.
7)
J.
The center of the circle below is point M.
Which expression can be used to find the length of ̅ in meters?
A.
B.
C.
D.
8) Raja drew a circle and labeled the center S. He used the expression
to find the
circumference of the circle in inches. Which of the following could be the circle Raja drew?
Unit 4A Part 2
Name:__________________
7.5C
9)
Triangle PQR is similar to triangle XYZ.
What is the length of ̅̅̅̅ ?
F. 11 in.
G. 13.5 in.
10)
H. 9 in.
J. 20.25 in.
Mrs. Hussen has two similar recycling bins in her office. The dimensions of the smaller bin can
be found by dilating the dimensions of the larger bin by a scale factor of 0.75.
What are the measurements of x and y on the smaller recycling bin?
F.
in.and
in.
H.
G.
in. and
in.
J.
11)
The two triangular prisms shown below are similar.
What is the value of x, the height of the larger prism?
A. 6.8 cm
B. 4 cm
C. 6 cm
D. 7.2 c
in. and
in. and
in.
in.
Unit 4A Part 2
12)
Parallelogram PQRS is similar to parallelogram WXYZ.
What is the length of ̅̅̅̅ ?
F. 3 units
G.
units
13)
Name:__________________
H. 5 units
J.
units
Janelle drew ̅̅̅̅ in isosceles trapezoid FGHJ to create similar trapezoids FKLJ and KGHL.
Based on the given information, what are the values of y and w in centimeters?
A. y = 11 cm and w = 15 cm
B. y = 15 cm and w = 15 cm
C. y = 11 cm and w = 27 cm
D. y = 15 cm and w = 27 cm
Unit 4A Part 2
14)
Pentagon ABCDE is similar to pentagon RSTUV. The perimeter of pentagon ABCDE is 36.8
centimeters.
What is the length of ̅̅̅̅?
A. 18 cm
B. 25.8 cm
15)
Name:__________________
Polygon QRST below was dilated by a scale factor of
What is the length in centimeters of ̅̅̅̅̅ ?
C. 15 cm
D. 19.8 cm
to create polygon Q’R’S’T’.
Unit 4A Part 2
16)
Name:__________________
Quadrilateral Q’R’S’T’ is a dilation of quadrilateral QRST, with the origin as the center of dilation.
What appears to be the scale factor used to create this dilation?
A.
B.
C.
D.
17)
4
0.5
2
0.25
The bases of the two similar triangular prisms shown below are equilateral triangles.
What is the value of x, an edge length of the larger prism in centimeters?