If a circle has a radius of 7 units, what is its area?

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Question: If a circle has a radius of 7 units, what is its area?

Options:

Correct Answer: 154

Solution:

Area = π * r^2 = π * 7^2 = 154 (using π ≈ 22/7).

If a circle has a radius of 7 units, what is its area?

If a circle has a radius of 7 units, what is its area?

Step 1: Identify the formula for the area of a circle, which is Area = π * r^2.
Step 2: Substitute the radius (r) into the formula. Here, the radius is 7 units.
Step 3: Calculate r^2. This means 7 * 7, which equals 49.
Step 4: Now, multiply π by 49. We will use π ≈ 22/7 for this calculation.
Step 5: Calculate (22/7) * 49. First, divide 49 by 7, which equals 7.
Step 6: Now multiply 22 by 7. This gives you 154.
Step 7: Therefore, the area of the circle is approximately 154 square units.

Area of a Circle – The area of a circle is calculated using the formula A = π * r^2, where r is the radius.