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Circle graphs
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Learn it A circle graph shows parts of a whole. Each sector's angle = percent × 360°. To go back: angle ÷ 360 gives the fraction.
Example: 45 of 180 students chose soccer. What angle is the soccer sector?
- Fraction: $45 \div 180 = \frac{1}{4} = 25\%$.
- $0.25 \times 360 = 90°$.
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