Worksheet on Similar Figures with Multiple Choice
Name:
Math 6- Due on:
Similar Figures and Indirect Measurement
Show proportions for all problems.
1. Parallelogram EFGH is similar to parallelogram WXYZ. What is the length of [pic]?
2. The alien is 5 feet tall. His shadow is 8 feet long. At the same time of day, a tree’s shadow is 32 feet long. What is the height of the tree?
3. Pentagon JKLMN is similar to pentagon VWXYZ.
What is the measurement of angle X?
4. Triangle LMN is similar to triangle XYZ. What is the length of [pic]?
Hint: Did you match the orientation of the triangles before solving?
5. Triangle PQR is similar to triangle DEF as shown.
Which describes the relationship between the corresponding sides of the two triangles? (Circle answer.)
a) [pic] b) [pic] c) [pic] d) [pic]
6. A six-foot-tall person is standing next to a flagpole. The person casts a shadow [pic] feet in length, while the flagpole casts a shadow 5 feet in length. How tall is the flagpole?
7. (PQR is similar to (XYZ. What is the perimeter of (XYZ?
Hint: How do you calculate perimeter?
8. The shadow cast by a one-foot ruler is 8 inches long. At the same time, the shadow cast by a pine tree is 24 feet long. What is the height, in feet, of the pine tree? (Hint: Notice the units.)
9. If triangles ADE and ABC shown in the figure to the right are similar, what is the value of x?
10. In the figure to the right, the two triangles are similar. What is the value of x?
11. Mr. Smith is having some photos enlarged for his studio. He wants to enlarge a photo that is 5 inches by 7 inches so the dimensions are 3 times larger than the original. How many times larger than the original photo will the area of the new photo be? (Be prepared to explain your answer.)
a) 3 b) 6 c) 9 d) 30
12. (ABC is similar to (XYZ. What is the length of segment [pic]?
13. (HIJ is similar to (STR. What is the perimeter of (STR?
14. Alanis is moving and needs to pack two mirrors. The largest mirror fits in a box that is 18 inches wide by 20 inches long. Her smaller mirror is similar in proportion to the larger mirror. Alanis determines that the width of the smaller box needs to be a minimum of 9 inches.
What should be the minimum length of the box to hold the smaller mirror?
15. The angle of the roof on Kaya’s dollhouse is 56(. She wants to build a scale model of the dollhouse with a scale ratio of 1:4. What should be the measure of the angle of the roof of the model?
a) 14( b) 34( c) 56( d) 224(
16. Ryan and Kathy each drew a triangle with an angle of 20 degrees. Under which condition would the triangles be similar?
A) if both are obtuse triangles
B) if both are right triangles
C) if the triangles have the same area
D) if the triangles have the same perimeter
Vocabulary: How to show equal angles on similar Δs:
Orientation –
Right angle –
Acute angle –
Obtuse angle –
[pic]–
Area – Naming similar Δs
Perimeter –
-----------------------
F
G
E
H
2 in
3 in
X
W
Y
Z
6 in
[pic]
[pic]
5 ft
8 ft
32 ft
[pic]
N 12 feet M
L
18 feet
24 feet
Y X
Z
8 feet
Q
P 6 cࠅࠆࠌࠓࠔࠝࠟࠠࠡ࠾ࡉࡊࡋࡍࢧࢨࢽࢾࢿ࣒࣓ࣔࣕࣖࣗࣚࣛࣜ퓱퓈낿낤鮿m R
4 cm
D 9 cm F
E
6 cm
10
5
Q
P
R
Y
X
Z
30
K
L
M
J
W
Y
60(
150(
?
[pic]
8 inches
1 foot
24 feet
12
x
C
B
E
D
A
2
3
4
9
6
5
x
11
19.8
Z
V
N
R
6
X
Y
Z
8 cm
10 cm
12 cm
6 cm
C
B
A
H
I
J
4
6
S
T
10
12
................
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