### 7.4 Fibonacci & Other Patterns

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• Math Help

Although the Fibonacci sequence starts with 0 and 1, a general Fibonacci sequence can start with other numbers. For instance, in Example 3, the drawing begins with two 1-unit squares. So, the first two numbers in the sequence are 1 and 1. You can then generate more numbers in this sequence as shown.

These numbers match the ones shown in the figure in Example 3.

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• Checkpoint Solution
1. Sunflower.
2. Romanesque broccoli.
3. Aloe polyphylla, or Spiral Aloe.

For general information on Fibonacci spirals found in plant life, visit world-mysteries.com.

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