Vocabulary Terms
Proportional Relationships
Area of Circles
Circumference of Circles
100
a line segment that goes from the center of a circle to the edge of a circle
radius
100
Decide whether or not the equation represents a proportional relationship.
The remaining length (L) of a 120-inch rope after x inches have been cut off: 120-x=L
no
100
Find the area of the circle.
28.26 units2
100
Find the circumference of the circle below.
31.4 cm
200
a line segment that goes from one edge of a circle to the other edge and passes through the center
diameter
200
Decide whether or not the equation represents a proportional relationship.
The total cost (t) after 8% sales tax is added to an item's price (p): 1.08p=t
yes
200
Find the area of a circle with a radius of 10 inches.
314 inches2
200
Find the circumference of a pizza with a diameter of 16 inches.
50.24 inches
300
the distance around the circle
circumference
300
Decide whether or not the equation represents a proportional relationship.
The number of marbles each sister gets (x) when m marbles are shared equally among four sisters:
x=m/4
yes
300
Find the area of the circle.
113.04 cm2
300
Find the circumference of a circle with a radius of 12 feet.
75.36 feet
400
the number of square units that cover the inside of a circle
area
400
There is a proportional relationship between the number of months a person has had a streaming movie subscription and the total amount of money they have paid for the subscription. The cost for 6 months is $47.94. The point (6,47.94) is shown on the graph below. What is the constant of proportionality in this relationship?
$7.99
400
Find the area of a circle with a diameter of 8 cm.
50.24 cm2
400
Find the circumference of a circle with a diameter of 6 inches.
18.84 inches
500
In a proportional relationship, the values for one quantity are each multiplied by the same number to get the values for the other quantity. This number is called the _____________.
Constant of proportionality
500
Which table represents a proportional relationship? And, what is the constant of proportionality?
Table A represents a proportional relationship and the constant of proportionality is 9.
500
Find the area of a circle with a diameter of 15 inches.
176.625 inches2
500
Find the circumference of the trampoline below.
43.96 inches