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If the radius of a circle is 7 cm, what is its area? (Use π = 22/7)
If the radius of a circle is 7 cm, what is its area? (Use π = 22/7)
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Practice Questions
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Q1
If the radius of a circle is 7 cm, what is its area? (Use π = 22/7)
154 cm²
44 cm²
77 cm²
88 cm²
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Area = π × radius² = (22/7) × (7 cm)² = 154 cm².
Questions & Step-by-step Solutions
1 item
Q
Q: If the radius of a circle is 7 cm, what is its area? (Use π = 22/7)
Solution:
Area = π × radius² = (22/7) × (7 cm)² = 154 cm².
Steps: 7
Show Steps
Step 1: Identify the formula for the area of a circle, which is Area = π × radius².
Step 2: Substitute the value of π with 22/7.
Step 3: Substitute the radius value (7 cm) into the formula: Area = (22/7) × (7 cm)².
Step 4: Calculate (7 cm)², which is 49 cm².
Step 5: Now multiply (22/7) by 49 cm²: Area = (22/7) × 49 cm².
Step 6: Simplify the multiplication: 49 ÷ 7 = 7, so Area = 22 × 7 cm².
Step 7: Finally, calculate 22 × 7, which equals 154 cm².
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