The Answer must be 4, as the top of the line with the question mark is half of the side with length 8.
1/2 x 8 =4
Hope that helps!!! :)
Let A be the top left vertex of the figure
B =the bottom left vertex of the figure
C = the bottom right vertex
D = top right vertex
E = the intersection of the diagonals
FE = the height we are looking for
Note that triangle ABE is similar to triangle CDE
So the altitude of ABE to the altitude of CDE =12 : 8
Therefore BF = (12)/ (12 + 8) BC = (12/20) BC
So FC = (8/20) BC
And triangle ABC is similar to triangle EFC
AB / BC = EF /FC
12 / BC = EF / FC
12/ BC = EF / [( 8/20) BC]
12 = EF / (8/20)
12 (8/20) = EF
96/20 = EF = 24/5 = 4.8 = ?
Oh. I get your reasoning but like-
The top of the line with a question mark should be half of the line with 8 centimetres which means it's 4?
That's what I see-
So could you please explain what I did wrong?
NOW what do you see IhaveOBJD ?
You have to be careful with what you see as diagrams are often 'not to scale' or misrepresented....