Calculating Area and Circumference of Circles
Free to teach as-is — the teacher guide, student handout, and slides are included.
Free — we'll email you an access link. Google Docs format.
Objective
I can calculate the area and circumference of circles given the radius or diameter.
Part 1 of 4
Warm-up video
Miacademy & MiaPrep Learning Channel · 8:50Vetted channel
We don't generate video — this one is by Miacademy & MiaPrep Learning Channel 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 diameter is the distance across the center of the circle, while the radius is the distance from the center to the outer edge; the radius is half the diameter.
- 2
The circumference of a circle is the distance around the circle, and can be calculated using the formula C = πd or C = 2πr, where π is approximately 3.14.
- 3
The area of a circle is calculated using the formula A = πr², where r is the radius and π is approximately 3.14.
Part 3 of 4
Practice
8 questions
What is the relationship between the radius and the diameter of a circle?
If a circle has a diameter of 10 cm, what is its radius?
Part 4 of 4
Exit ticket
Quick comprehension check
“A circle has a diameter of 14 cm. What is its area? Show your work, using 3.14 as the approximation for π.”
Sample answer included in the free materials
Get the materials
Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
Complete lesson plan with answer keys and alternate activities
Student Handout
Printable worksheet
Slides
Ready to present
We'll ask for your email to send your access link — nothing else.
Teaching a group at a different level?
Where are your students right now? We'll rebuild this lesson to match — including the teacher guide, student handout, and slides, saved to your Google Drive.
Adapt This Lesson
