Any number from -10 to -∞ would be correct. One example is -79.
Answer:
2) ∠SDH and ∠SDT are right angles because SD ⊥ HT.
3)
as it is given in the question.
4)
is the reflexive property.
5) ΔSHD ≅ ΔSTD by RHS congruency.
Step-by-step explanation:
Given in the question:

In ΔSHD and ΔSTD
(Given)
(SD ⊥ HT)
(Common)
Therefore,
(By RHS rule)
Reflexive property of congruency is defined as the property in which something is equal to itself. Hence, the reflexive property of these two triangles is 
Washington D.C is the capital of the US
The answer is 6 because 6 times 7 equals 42.
I think the answer is 99.6. I'm sorry if it's wrong.