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Circles: Circumference Given – Find Area — Easy Worksheet 2
Grade 7 · MathSheets Name: ____________________ Date: __________
Use π ≈ 3.14. Round your answer to one decimal place when needed.
How to solve
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Example
A circle has circumference 50.2. Find the diameter.
Answer: 16
Not quite. The answer is
✓ Correct!
Not quite. The answer is
💡 How to solve: Circles: Circumference Given – Find Area
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Try a similar one
A circle has circumference 25.1. Find the diameter.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
✓ Correct!
Not quite. The answer is
💡 How to solve: Circles: Circumference Given – Find Area
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Try a similar one
A circle has circumference 50.2. Find the diameter.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
✓ Correct!
Not quite. The answer is
💡 How to solve: Circles: Circumference Given – Find Area
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Try a similar one
A circle has circumference 50.2. Find the diameter.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
✓ Correct!
Not quite. The answer is
💡 How to solve: Circles: Circumference Given – Find Area
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Try a similar one
A circle has circumference 31.4. Find the diameter.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
✓ Correct!
Not quite. The answer is
💡 How to solve: Circles: Circumference Given – Find Area
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Try a similar one
A circle has circumference 12.6. Find the diameter.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
✓ Correct!
Not quite. The answer is
💡 How to solve: Circles: Circumference Given – Find Area
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Try a similar one
A circle has circumference 37.7. Find the diameter.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
✓ Correct!
Not quite. The answer is
💡 How to solve: Circles: Circumference Given – Find Area
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Try a similar one
A circle has circumference 56.5. Find the diameter.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
✓ Correct!
Not quite. The answer is
💡 How to solve: Circles: Circumference Given – Find Area
Circumference = π × d, so d = C ÷ π and r = d ÷ 2. Then Area = π × r². Example: C = 31.4 → d = 31.4 ÷ 3.14 = 10, r = 5, A = 3.14 × 25 = 78.5.
Try a similar one
A circle has circumference 12.6. Find the diameter.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
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Circles: Circumference Given – Find Area — Easy Worksheet 2
Use π ≈ 3.14. Round your answer to one decimal place when needed.