1962 AMC 12 Question 23
AMC12 · 1962 AMC 12
In triangle $ABC,$ $CD$ is the altitude to $AB$ and $AE$ is the altitude to $BC.$ If the lengths of $AB,$ $CD,$ and $AE$ are known, the length of $DB$ is:
not determined by the information given
determined only if $A$ is an acute angle
determined only if $B$ is an acute angle
determined only if $ABC$ is an acute triangle
none of these is correct