Scales and Proportionality
True or false: the overall shape of a drawing would remain the same when scaled up by 3
True
The round rim of a salt shaker has a radius of 2 centimeters. What is the rim's diameter?
4 centimeters
What is 60% of 45?
27
4 x -6 =___
-26
2k = 8
k = ___
4
If the long side of a rectangle is 4in, what is the length when scaled up by 5?
20in
The button on Sofia's coat has a radius of 5 millimeters. What is the button's diameter?
10 millimeters
What is 25% of 52?
13
-27 + 4 =___
-23
2r + 2 = 6
r = ___
r = 2
If the scale on the map says that 1 inch is three miles, how many miles would 4 inches represent?
12 inches
A circle of red roses is planted in Princeton's central park. The circle has a diameter of 4 meters. What is the circle's radius?
2 meters
50% of 62
31
15(-6 + 55) =___
535
20 = 4(n + 1)
n = ___
n = 4
The ice cream truck drives 30 miles everyday. Once the driver got old, he decided to downsize his route by 3. How many miles does he drive now?
10 miles a day.
As a contestant on a televised game show, Chad gets to spin the big prize wheel, which has a radius of 2 meters. What is the prize wheel's area?
12.56 sq meters
60% of 20
12
-37 x -4 =___
148
27(3x + 9) = 90
x = ___
x = 1
The swift teachers use 84 sheets of paper a day. They decided to cut back by now having 2/3 of their documents be digital. How many documents do they have digitally a day?
56 documents are now digital.
A state seal, which is round, hangs in the capitol building. It has a radius of 1 meter. What is the seal's area?
3.14 sq meters
50% of $66?
33
-30(.5 + -8) =___
225
115(7p + 3) = 3795
p = ___
p = 5