yes the angle tcd is indeed 45 degrees, but it isn't the same as the angle formed by tc and abcd, becaus i think you calculate that but making the orthagonal (right) projection of tc at abcd, so that would become oc (where o is the middle of ad) and so you get an angle of 37°45' and some...
At my math exam i got this picture of a piamide.
Now the question was to calculate the angle made by [tc] and the square (abcd)
how much is that angle?
my thougth was 37°45' and some "can you help me, with a calculation?
the pictur is an attachement and also can be found @...
i've collected some datat to get a formula to calculate this data in general. but now the problem is that i don't know how to find that formula.
i think the formula is something like {(AX+B)*((C(Y+D))^E)}/F=Z
but how do i calculate the A,B,C,D and E?
if someone would have my xls with the...