Key Terms
What is the radius of a circle?
A line that goes from one point of the circle to the middle.
What are the two formulas for solving circumference?
2πr or dπ
My circle has a circumference of 20 centimetres. What is the diameter?
The diameter is 6.369 centimetres.
Chloe's pan has a radius of 2 inches. What is the diameter of her pan?
The diameter of her pan is 4 inches.
What are my favourite artists (2)?
Harry Styles and Taylor Swift
What is the diameter?
A line that crosses from one end of the circle through the middle.
What is the formula for solving the area?
My circle has a circumference of 20 centimetres. What is the radius?
The radius is 3.184 centimetres.
Abby wants to split her cookie evenly with Phinn. If the diameter of the cookie is 30 millimetres, how much of the cookie would Phinn get?
Phinn would get 353.25 square millimetres of the cookie.
What is my favourite color?
Purple
What is the circumference?
The full length around the circle.
If you know the diameter what do you need to do to figure out the radius?
Divide the diameter by two.
My circle has a circumference of 1,234,567,890 inches. What is that diameter?
The diameter is 393,174,487.261 inches.
Milo's circular garden has a radius of 5 feet. He wants every square foot to be covered in roses. How many square feet of roses will he need?
Milo will need 78.5 square feet.
What is my favourite movie series?
The Hunger Games
What is a chord?
A line that crosses from one part of the circle to the other without going through the middle.
How do you get the diameter from the circumference?
C÷π
My circle has a circumference of 24 feet. What is the radius?
The radius is 7.643 feet.
Grace's smartie has a radius of 4 millimetres. Defne's smartie has a diameter of 10 millimetres. Who's smartie is bigger?
Defne's smartie is bigger.
What are my go-to stores (3)?
Under Armour, American Eagle and H&M
What do you use to construct a circle?
A compass.
How do you get the radius from the circumference?
(C÷3.14)÷2
The circumference of my circle is 69 inches. What is that diameter? What is the radius?
Diameter: 21.974 inches
Radius: 10.987 inches
Ben wants to paint his table white. How much paint will he need if his table has a radius of 5 feet?
Ben will need enough paint to paint 78.5 square feet.
What are my 2 dogs' names?
Chewie and Frankie