Popular: 1/2 + 3/4 20% of 150 GCF(12, 18) 100 ÷ 7 √144 Circle r=7 sin(30°) 255 in Binary
Exact Answer
A = π × 82 = 201.0619
Area (πr²)
201.0619 (64π)
Circumference (2πr)
50.2655 (16π)
Diameter (2r)
16
Radius (r)
8
Circle Radius (r):

Step-by-Step Solution: A = π × 8² = 201.0619

Step 1

Calculate the Area Using A = πr²

Square the radius (8² = 64) and multiply by π (≈ 3.14159265): 64 × π = 201.0619.
A = π × 8² = 64π ≈ 201.0619
Step 2

Calculate the Circumference Using C = 2πr

Multiply 2 × π × 8 = 16π ≈ 50.2655.
C = 2 × π × 8 ≈ 50.2655

Summary & Alternative Representations

Property / FormatValue
Area (πr²)201.0619 (64π)
Circumference (2πr)50.2655 (16π)
Diameter (2r)16
Radius (r)8

Frequently Asked Questions

What is the circumference of a circle with radius 8?

The circumference is 2 × π × 8 ≈ 50.2655.