Since I would consider this a typical proportional problem, I wonder that too?The problem is attached. It is triangle and its peak is having value 1

the sides are at a and -a. The new point is on a/4. from which i have drawn perpendicular line

i want to know what is the value of that point on y-axis scale.

book says it is 0.733

but how???

Are you sure you don't have any more information ona?

Ifacan be any number, triangle heightycan be 0<y<1 ?