Calculate the area of a circle with a radius of 7 cm (use π ≈ 3.14).

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Question: Calculate the area of a circle with a radius of 7 cm (use π ≈ 3.14).

Options:

Correct Answer: 153.86 cm²

Solution:

Area = π × radius² = 3.14 × (7 cm)² = 3.14 × 49 cm² = 153.86 cm².

Calculate the area of a circle with a radius of 7 cm (use π ≈ 3.14).

Calculate the area of a circle with a radius of 7 cm (use π ≈ 3.14).

Correct Answer: 153.86 cm²

Step 1: Identify the radius of the circle. The radius is given as 7 cm.
Step 2: Use the formula for the area of a circle, which is Area = π × radius².
Step 3: Substitute the value of π with 3.14 and the radius with 7 cm into the formula: Area = 3.14 × (7 cm)².
Step 4: Calculate (7 cm)², which is 7 cm × 7 cm = 49 cm².
Step 5: Now substitute this value back into the formula: Area = 3.14 × 49 cm².
Step 6: Multiply 3.14 by 49 cm² to find the area: Area = 153.86 cm².

Area of a Circle – The area of a circle is calculated using the formula A = π × r², where r is the radius.