The picture shows a sketch of escaladers in the underground station in Kyoto.
The escaladers go from A that lies on the track, over D to F, and ends in H which lies in the street level. Some of the measures are already on the picture.
– Find the lengths of D to E
– Find the angel A and the length of the escalader from A to D
The escalader from F to H is 25 meters long
– Find the high differences between tracks and street level (K to H)
– Find the length from A to K
Sorry ! We need the lenght of CE. Thanks
okay sorry, I missed some thing on the drawing.
A to E is 21 m
E to G is 4 m
ok ! thank you !
first question:
QUESTION 1:
(BC) perpenducular to (AE) and (DE) perpendicular to (AE).
If to lines are perpendicular to a same line,so they
are parallels
So (BC) and (DE) are parallels.
A is on (BD) and (CE) and (BC) parallel to (DE)
so, with the theorem of Thalés we have :
BC/DE = AC/AE = (AB/AD)
4/DE = 7/21 we use the cross system
we have : 4*21=7DE
4*21/7=DE
DE=12
Yes |BC| and |DE| are parallels.
And yes again |DE| is 12