1. **Problem:** The Ferris wheel has a radius of 20 m. The platform is tangent to the Ferris wheel. How far is the platform from the center of the wheel? 2. **Formula and Explanation:** The distance from the center of a circle to a tangent line is equal to the radius of the circle. 3. **Solution:** Since the platform is tangent to the Ferris wheel, the distance from the center of the wheel to the platform is exactly the radius. $$\text{Distance} = 20 \text{ m}$$ 4. **Answer:** The platform is 20 meters from the center of the Ferris wheel.