Radius, Diameter, Circumference, and Pi

12 inches in this circle represents its

• radius

• diameter

Tags

TEKS.MATH.7.9B

14cm in the circle represents its

• radius

• diameter

What is the length of the diameter of the circle?

What is the length of the radius of the circle?

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

Tags

TEKS.MATH.7.9B

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

• C = r²

• C = rd

• A = π·r²

• C = π·d

Tags

TEKS.MATH.7.9B

Find the circumference of the circle

Tags

TEKS.MATH.7.9B

What is the approximate circumference? (use 3.14 for pi)

Tags

TEKS.MATH.7.9B

Find the circumference of the circle

Tags

TEKS.MATH.7.9B

Find the circumference of the circle.

Tags

TEKS.MATH.7.9B