Vocabulary
A shape where each point is same distance from the center
What is a circle
My diameter is 4 cm what is my radius
What is 2 cm
What is this symbol's name: П
Pi
3.14 x 4 = ?
12.56
The distance across a circle
What is the diameter
The radius is 9 cm what is the diameter
What is 18 cm
We use this decimal number as close to the value of pi
What is 3.14
П = ___.___ ___
3.14
The distance halfway across a circle
What is radius
The radius is 200 cm what is the diameter
What is 400 cm
The diameter is 100 cm what is the radius
What is 50 cm
We use pi to find the distance all the way around the outside of a circle, known as...
What is circumference
3.14 x 2 = ?
6.28
The distance all the way around the outside a circle
What is circumference
The radius is 985 cm what is the diameter
What is 1,970 cm
My diameter is 2.4 what is the radius
Radius is 1.2
п x diameter will find the (area or circumference) of a circle
circumference
Spongebob says the circumference of a circle with a diameter of 1 is 3.14. Is he right?
YES!
3.14 x 1 = 3.14
Circumference is the same as this measurement we learned about with rectangles and squares
What is perimeter
The radius is 1.537 cm what is the diameter (hint: radius x 2!)
What is 3.074 cm
My diameter is 64 cm what is my radius
What is 32 cm
🔵 Fun Space -- tell us something in your house that's a circle! 🔵
The top of my coffee mug! Roll of tape! A coaster! Etc.
Patrick says the circumference of a circle with a RADIUS of 1 is 3.14. Is he right?
NO! 1 + 1 = 2. Diameter = 2 3.14 x 2 = 6.28