Triangle ABC has the height AD and angle A = 90º. If CD = 4, and BD = 5, find this ratio [ACD]/[ABD].
If it has a height of AD, then 4/5
I'm not sure why they gave that angle A is 90 degrees, maybe I drew it wrong.
Your answer is correct!!! But, it would be more interesting if they asked for this ratio [ACD]/[ABC].