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I will ignore this because it is an external link. 

 > I do not know what is indicated by the link '#duckiesky_high_school_student/sac1-basics-sensors'.

1. Accuracy: How close are the measurements to the truth

2. Precision: How close are the measurements of the same item to each other

- Meters, NOT inches or feet

- [Radians](https://en.wikipedia.org/wiki/Radian), NOT degrees