Beja Expert Licensed User Longtime User Sep 17, 2020 #1 Find D A Observer Ob A measures pole Point B (P B) 10 meters, and then drive away from it to point (Ob A) from point (Ob A) he sees the pole's height as 4 meters.. find distance D A.
Find D A Observer Ob A measures pole Point B (P B) 10 meters, and then drive away from it to point (Ob A) from point (Ob A) he sees the pole's height as 4 meters.. find distance D A.
Beja Expert Licensed User Longtime User Sep 17, 2020 #2 In other words: You know a tree's height is 10m, now you are looking at it from a distance and you see the height is 4m. Question: how far are you (distance) from the tree?
In other words: You know a tree's height is 10m, now you are looking at it from a distance and you see the height is 4m. Question: how far are you (distance) from the tree?
Erel B4X founder Staff member Licensed User Longtime User Sep 17, 2020 #3 The height cannot change. The distance doesn't matter. You should measure the sharp angle. Distance = <pole height> / Tan (alpha)
The height cannot change. The distance doesn't matter. You should measure the sharp angle. Distance = <pole height> / Tan (alpha)
rabbitBUSH Well-Known Member Licensed User Longtime User Sep 19, 2020 #4 OH, Heavens, @Beja Here We GO as Leonard would say : then this Leonardo would say : OK so DA is an illusion, that changed colour and went out of focus. Hence, is a distant object of undefined properties. DA must therefore be 10m because when H was 10m DA was 4m ergo when H is 4 DA must be 10m. I've been watching too much ElectionUSA stuff - - - evidently.
OH, Heavens, @Beja Here We GO as Leonard would say : then this Leonardo would say : OK so DA is an illusion, that changed colour and went out of focus. Hence, is a distant object of undefined properties. DA must therefore be 10m because when H was 10m DA was 4m ergo when H is 4 DA must be 10m. I've been watching too much ElectionUSA stuff - - - evidently.
Sandman Expert Licensed User Longtime User Sep 21, 2020 #5 Beja said: Find D A Click to expand... It took me quite a while, but I think I found it:
