Answer:
3 cm.
Step-by-step explanation:
We have been given that diagonal BD of a square ABCD is 6 cm long and we are asked to find the length of AE.
Since we know that diagonals of a square are equal and bisects each other at right angles.
We can find length of segment AE by dividing 6 cm by 2.


Therefore, length of AE will be 3 cm.