Calculating Area and Circumference of Circles
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Objective
I can calculate the area and circumference of circles given the radius or diameter.
Part 1 of 4
Warm-up video
Kayla Jones · 2:45
We don't generate video — this one is by Kayla Jones on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
The formula for the area of a circle is Area = π * r², where r is the radius.
- 2
Circumference is a fancy word for perimeter when referring to circles, and it measures the distance around the outside of the circle.
- 3
The formula for the circumference of a circle is Circumference = 2 * π * r, where r represents the circle's radius.
Part 3 of 4
Practice
11 questions
What does 'circumference' mean in the context of circles?
Write the formula for the area of a circle.
Part 4 of 4
Exit ticket
Quick comprehension check
“A circle has a radius of 12 cm. Calculate its area and circumference. Show your work, and round your answers to one decimal place. Use π = 3.14.”
Sample answer included in the free materials
Get the materials
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