What is the area of a circle with a radius of 4 units? (Use π ≈ 3.14)

Prepare for the Mathnasium Training Exam. Study with effective techniques, flashcards, and multiple-choice strategies. Understand key concepts with detailed hints and explanations. Ace your exam confidently!

Multiple Choice

What is the area of a circle with a radius of 4 units? (Use π ≈ 3.14)

To find the area of a circle, the formula to use is A = πr², where A represents the area and r represents the radius. With a radius of 4 units, you can substitute this value into the formula. First, calculate the square of the radius: r² = 4² = 16. Next, multiply this by π. Using the approximation π ≈ 3.14, the calculation becomes: A = πr² = 3.14 × 16. To find this product: 3.14 × 16 = 50.24. Thus, the area of the circle with a radius of 4 units is 50.24 square units. This matches the correct answer and confirms that using the formula accurately produces the desired result.

To find the area of a circle, the formula to use is A = πr², where A represents the area and r represents the radius. With a radius of 4 units, you can substitute this value into the formula.

First, calculate the square of the radius:

r² = 4² = 16.

Next, multiply this by π. Using the approximation π ≈ 3.14, the calculation becomes:

A = πr² = 3.14 × 16.

To find this product:

3.14 × 16 = 50.24.

Thus, the area of the circle with a radius of 4 units is 50.24 square units. This matches the correct answer and confirms that using the formula accurately produces the desired result.

More practice questions