Question 541610
make a mark on the ground and stand the meter stick vertically on the mark


make a mark at the end of the meter stick's shadow, and a mark at the end of the flagpole's shadow
___ the lengths of the shadows will change with time, so make the two marks quickly


use the meter stick to measure the lengths of the shadows of the stick and the flag pole


the ratio between the flag pole and its shadow is the same as the ratio between the meter stick and its shadow