Explanation:
For this given problem we have the following statements and reasons:
1) SD is vertical to HT,
Reason: Given
2) SDH and SDT are right angles
Reason: Right angle congruence theorem
3) SH=≈ST
Reason: Given
4) BD=≈BD
Reason: Reflexive property
5) SHD=≈STD
Reason: SAS