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Anonymous users2024-01-24Thumb distance measurement"It is measured in terms of right angle trigonometric functions.
Suppose there is a target N meters away from us, measure the distance from us to the target:
1. Raise our right arm horizontally, make a fist with the right hand and stand up the thumb 2. Use the right eye (left eye closed) to overlap the left side of the thumb with the target in a straight line;
3. If the right arm and thumb do not move, close the right eye, and then observe the left side of the thumb with the left eye, you will find that the edge line is a distance away from the right side of the target;
4. Estimate this distance (this can also be measured), and the distance is 10, and the number is the approximate distance between us and the target.
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