What's That Circle Part?
Formulas Galore
Label that Circle
Circumference goes around the outside, around the outside, around the outside
Amazing Areas
100

The line segment that goes from the center to the outside...

What is the radius?

100

How to find the diameter if you know the radius

What is d= 2r?


100

What is the radius?


What is 5 cm?

100

A circle has a radius of 3 cm. What is its circumference (use π≈3.14)?

What is 18.84cm?

100

A circle has a radius of 2 cm. What is its area (use π≈3.14)?

What is 12.56 cm2?

200
A line segment that goes all the way across. It is twice the length of the radius....

What is the diameter?

200

The formula for finding the area of a circle.

What is A=πr2

200

What does line QR represent?

What is the radius?

200

What is the formula for finding the circumference of a circle? 

What is C = πd

200

What is the formula for finding the area of a circle? 

What is A=πr2

300
The middle of the circle...

What is the center?

300

The formula for finding the circumference of a circle.

What is C=πd?

300

Name the diameter...



What is AC or ADC?

300

If a circle’s diameter is 8 cm, what is its circumference (use π≈3.14)?

What is 25.12 cm?

300

A circle has a diameter of 10 cm. What is its area (use π≈3.14)?

What is 78.5 cm2?

400

The point exactly in the middle of the circle.


What is the center?

400

The formula for finding Pi if you know the circumference and Diameter

What is π = C/d?

400

Label all the possible Radius' in the image...


What is AD, CD, and DB?

400

If a circle has a radius of 12cm, what is the circumference? (use π≈3.14)?

What is 75.36cm?

400

A circle has a diameter of 20cm was is the area? (use π≈3.14)?

What is 314cm2?

500

πd or 3.14x diameter....is.....

What is circumference?
500

The formula for finding the diameter if you know the circumference.

What is d=C/π

500

What does AB or AOB represent in the image below?


What is the diameter? 

500

A circle has a circumference of 30cm, what is the diameter? (use π≈3.14)?

What is 9.55cm?

500

A circle has a diameter of 250m, what is the area? (use π≈3.14)? 

What is 49062.5cm2?

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