What additional information is required in order to know that the triangles are
congruent by HL?

Option D

Step-by-step explanation:

In ΔHBC and ΔACB,

            Statements                      Reasons

1). CB ≅ CB (leg)                          1). Reflexive property

2). BA ≅ CH (Hypotenuse)         2). Additional information for the

                                                       congruence of two right triangles by HL

                                                       property.

3). ΔHBC ≅ ΔACB                       3). HL property of congruence

Option D will be the correct option.