Scale Drawings
Proportional Relationships
Circles
Percents
Positive and Negative Numbers
100
A triangle has side lengths of 3, 4, and 5 cm.
A scaled copy has side lengths of 15, 20, and 25 cm.
What was the scale factor?
5
100
What does C.O.P. stand for?
Constant of Proportionality
100
What is the name of the line that goes from one end of the circle to the other and crosses the center point?
Diameter
100
What is 13% as a decimal?
0.13
100
What is an Integer?
A counting number that is positive, negative, or zero
200
David measured a swimming pool and made a scale drawing. In real life, the diving board is 20 feet long. It is 2 inches long in the drawing. What scale did David use for the drawing?
1 inch = __ ft
10 ft
200
Is the graph proportional or non proportional?
No
200
Is the circumference of a circle a proportional relationship
Yes
200
The cost of a hat is currently 12. Next year it is increasing by 25%. What is the new cost?
$15
200
What is a positive divided by a negative?
Negative
300
Luther drew a scale drawing of an Italian restaurant. He used the scale
1 millimeter : 6 meters
In the drawing, the restaurant's kitchen is 3 millimeters wide. What is the width of the actual kitchen?
18 m
300
Craig earns extra money as a lifeguard. He earns $36 for 4 hours and $63 for 7 hours. What is the constant of proportionality?
$9
300
Find the circumference of the circle.
18.84 cm
300
A new phone is increasing it's battery life by 15%. Currently the battery lasts 12 hours. How long will the new battery last?
13.8 hours
300
- 8 - - 9
Circumference
400
A triangle has side lengths of 20, 28, and 40 mm.
A scaled copy has side lengths of 5, 7, and 10 cm.
What was the scale factor?
1/4 or 0.25
400
What is an equation of a proportional relationship that has a C.O.P. of 4?
y=4x
400
The homeowners association wants to plant new grass in their circular playground in a fence. The playground has a diameter of 25 feet.
What is the area of the circular playground?
1962.5 feet
400
The number of students at Sheldon Middle School is currently 72. Next year it is decreasing by 12.5%. How many students will be in Middle School next year?
63 Students
400
(-5)(-4)
20
500
Gabby made a scale drawing of the town library. She used the scale
1 centimeter : 5 meters
The actual width of the parking lot is 80 meters. How wide is the parking lot in the drawing?
16 cm
500
Cups of Fries Cost
2 16
6 48
Write an equation that represents the relationship between Fries and Cost. How much would 7 cups of fires cost?
c = 8f or y = 8x
$56
500
Randy’s circular garden has a radius of 1.5 feet. He wants to enclose the garden edging that costs $0.75 per foot. About how much will the edging cost? Use 3.14 for pi.
$ 9.42
500
After a 20% tip, a bill cost $36. What was the original cost of the bill?
$30
500
What is the missing value that would make this equation true?
15 - x = 18
x = -3