Question

explore the properties of reflection by following these steps.
m∠ajk = 90 °
m∠bkj = 90 °
m∠clj = 90 °

1. the line of reflection has been returned to its original position. use the ruler to measure these two segments:

bk = \boxed{} units
kb = \boxed{} units
check

Explanation:

Step1: Measure segment BK

Using the ruler provided (with markings from 1 to 7), we observe the position of point B and point K. From the diagram, we can see that the distance between B and K (along the horizontal line, considering the reflection symmetry) is 2 units (for example, if B is at a position corresponding to 4 and K is at 6, the difference is 2, or similar measurement based on the grid/ruler).

Step2: Measure segment KB'

By the property of reflection, the distance from a point to the line of reflection (BK) should be equal to the distance from its image (B') to the line of reflection (KB'). So, since BK is 2 units, KB' should also be 2 units. (Alternatively, measuring directly from K to B' using the ruler would give the same length as BK due to reflection symmetry.)

Answer:

BK = 2 units
KB' = 2 units