Cub
Posted: Tue Mar 09, 2010 9:08 pm
Fie ABCDA'B'C'D' un cub cu latura de lungime a si punctele \( M\in (A^{\prime}D^{\prime} \), \( N\in (AB \), \( P\in (CC^{\prime} \) astfel incat D'M=AN=CP=x, \( x\in (0;2a) \). Aratati ca:
a) \( (MNP)\parallel (AD^{\prime}C) \)
b) \( V_{B^{\prime}MNP}<V_{B^{\prime}A^{\prime}C^{\prime}D. \)
G.M 12/2009
a) \( (MNP)\parallel (AD^{\prime}C) \)
b) \( V_{B^{\prime}MNP}<V_{B^{\prime}A^{\prime}C^{\prime}D. \)
G.M 12/2009