Circumference of circle radius 7 (π=22/7).

**The reasoning** The formula for circumference is **C = 2πr**, where r is the radius. Given: r = 7 and π = 22/7 Substitute into the formula: C = 2 × (22/7) × 7 Let's work through it: C = 2 × 22 × 7/7 C = 2 × 22 × 1 C = **44** Notice how the 7s cancel out perfectly! This is actually a common exam setup — when they give you π = 22/7 and radius = 7 (or 14, 21, etc.), the calculation becomes super clean. **Why the wrong options tempt you** - **A) 22** — You might forget to multiply by 2, using just πr instead of 2πr - **C) 88** — You might accidentally do 2 × 2 × 22 (multiplying the 2 by itself) - **D) 154** — This is the **area** (πr² = 22/7 × 49), not circumference. Classic trap when you're rushing! **Quick takeaway** Circumference = "going around" = 2πr (always has that 2); Area = "filling inside" = πr² (has the square). Know your formulas cold!