Parts of a circle
Finding Circumference
Radius and Diameter
Ratios
Random
100
What is this circle called?
Circle A
100
Use the equation C = 2πr to find the circumference.
31.4 cm
100
If the radius is 5 what is the diameter?
10
100
If there are 10 dogs, 5 cats and 2 birds, what is the ratio of dogs to birds?
10 to 2
100
What is the number for pi?
3.14
200
Which is the diameter line?
AB
200
Use the equation C = 2πr to find the circumference.
175.84 cm
200
If the radius is 25 what is the diameter?
50
200
If there are 10 dogs, 5 cats and 2 birds, what is the ratio of all animals to cats?
17 to 5
200
How do you find the radius from the diameter?
divide the diameter by 2
300
Which one is the radius line?
CO or BO or AO
300
Use the equation C = πd to find the circumference.
25.12cm
300
If the radius is 35.2 what is the diameter?
70.4
300
Ms.Garcia has a class of 23 students. In the class there are 5 students with blond hair, 10 with brown hair and the rest of the students have black hair. What is the ratio of students with black hair to students with blond hair?
8 to 5
300
How do you find the diameter from the radius?
Multiply it by 2 or double it
400
The inside of a circle is called what?
The area
400
Use the equation C = πd to find the circumference.
37.68cm
400
If the diameter is 15 what is the radius?
7.5
400
At SMS there are 250 students, 36 teachers, 2 principals, 2 secretaries and 3 custodians. What is the total amount of teachers to the total amount of people at SMS?
36 to 293
400
A letter or symbol that is a place holder for a number is called a what?
Variable
500
What is the outside of a circle called?
Circumference
500
They want to build a new track at the school. They know they want the radius for it to be 25 feet long. What will the circumference of the track be?
Use the equation C = 2πr to find the circumference.
157 feet
500
If the diameter is 46.5 what is the radius?
23.25
500
If a recipe calls for 2 cups of sugar to every 4 cups of milk and I want to triple the recipe, what would my ratio be?
6 to 12
500
The line in a fraction means what?
Divide