How to Calculate the Area of a Circle with an 8 cm Radius
Learn how to find the area of a circle with an 8 cm radius using the formula πr².
Video transcript
The area of an 8 cm radius circle can be calculated using the formula πr². Substituting r = 8 cm, the area is π * (8 cm)² = 64π cm². Approximating π as 3.14, the area is approximately 201.06 cm².
Questions and answers
What is the formula for the area of a circle?
The formula for the area of a circle is A = πr², where A is the area and r is the radius.
How do you approximate π?
π can be approximated as 3.14 for easier calculations, though a more precise value is 3.14159.
What is the area of a circle with a radius of 10 cm?
The area of a circle with a radius of 10 cm is A = π(10 cm)² = 100π cm², which is approximately 314.16 cm².
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