Area of a Circle with Radius 4

Finding the area of a circle is a fundamental concept in geometry. In this example, we will calculate the area of a circle with a radius of 4 units.

1. Identify the given radius: r = 4 units.

2. Write down the formula for the area of a circle: The area A of a circle is given by A = πr², where r is the radius of the circle.

3. Substitute the given radius into the formula: Using r = 4, we have A = π × 4² = π × 16 = 16π.

4. Evaluate the expression: Using the value of π ≈ 3.1416, we have A ≈ 16 × 3.1416 ≈ 50.2656 square units.

Conclusion: The area of a circle with a radius of 4 units is 16π or approximately 50.2656 square units. This example illustrates the application of the formula for the area of a circle, a key concept in geometry.

Area of a Circle with Radius 4 is an essential topic for students learning geometry, and understanding this example helps in grasping the concept of area calculation for circular shapes.