Géométrie descriptive

[nivlek]

Bonjour !
UNAidez-moi à résoudre cet exercice de géométrie descriptive svp
EXERCICE 9 : Une stèle pour les Victimes du 4 janvier 1959 Le Gouvernement de la République s'est décidé de construire une stèle en mémoire des victimes du 4 janvier 1959. monument mémorial est une pyramide ( SABC ) à base d'un triangule équilatéral horizontal ABC de 7m de côté , dont travaux s'étaient arrêtés à la fondation . Une équipe d'ingénieurs dépêchée sur les lieux a relevé ce qui suit : ■ Délimitation du terrain : ( 20m x 28 ) m , à droite du Blvd. Triompal ; * Ombre au sol de l'arête AB de la base : longitude équatoriale Est ; ■ Coordonnées d'ombres d'autres points : A ( 5,10,20 ] m , S ( 13,17,10 ) m , C en arrière et de même hauteur que AB . On demande ( échelle 1/100 ) : 1. Les coordonnées réelles des points B , C de la base ( ABC ) du monument 2. Les sections planes de la pyramide dans le premier et le second bissecteur ; Représenter le volume comprise entre la base et la section ;

 

[Dr.Peterson]

Here is what you said, according to Google (you or others may correct it):

Hello!
Please help me solve this descriptive geometry exercise
EXERCISE 9: A stele for the victims of January 4, 1959. The Government of the Republic decided to build a stele in memory of the victims of January 4, 1959. The memorial monument is a pyramid (SABC) with a horizontal equilateral triangle base (ABC) having a side length of 7m; construction had halted at the foundation stage. A team of engineers dispatched to the site recorded the following: ■ Site boundaries: (20m x 28m), to the right of Blvd. Triompal; * Ground shadow of base edge AB: East equatorial longitude; ■ Shadow coordinates of other points: A (5, 10, 20) m, S (13, 17, 10) m, C located behind and at the same height as AB. Required (scale 1:100): 1. The actual coordinates of points B and C of the monument's base (ABC); 2. The planar sections of the pyramid in the first and second bisector planes; Represent the volume contained between the base and the section.

If there was a picture associated with the question, we'll want to see it.

Now you need to tell us what sort of help you need. Have you made any attempt? Please show it. Is there a particular point at which you are unsure? Or do you just want someone to do it all for you?

 

[khansaheb]

Here is what you said, according to Google (you or others may correct it):



If there was a picture associated with the question, we'll want to see it.

Now you need to tell us what sort of help you need. Have you made any attempt? Please show it. Is there a particular point at which you are unsure? Or do you just want someone to do it all for you?

In addition, please tell us why would you want to solve this problem?

Is this is a problem from your instructional class or workplace problem?