Reason:
2. SD ⊥ HT. ∴ ∠SDH = ∠SDT =90°
3. Given (It is given in the question)
5. RHS congruence
(Here, the right angle, hypotenuse and one side of ΔSHD is congruent to that of ΔSTD).
Statement:
4. Line segment SD = SD 
(Reflexive property is used to prove congruence of triangles. This property is used when an angle or line segment is congruent to itself.)
 
        
                    
             
        
        
        
Solve for r in the first equation:
3(r+300) = 6
Use the distributive property:
3r + 900 = 6
Subtract 900 from both sides:
3r = -894
Divide both sides by 3:
r = -894 / 3
r = -298
Now you have r, replace r in the second equation and solve:
 r +300 -2 = 
-298 + 300 - 2 = 0
The answer is 0.
 
        
             
        
        
        
Answer:
reflex angle
Step-by-step explanation:
Acute is less than 90
Right = 90
Obtuse is greater than 90 and less than 180
Straight is 180
Reflex is greater than 180 and less than 360
This is greater than 90 and less than 180 so it is a reflex angle
 
        
             
        
        
        
I believe the answer would be B. 11 because you can see a pattern. Its just skipping.
 
        
                    
             
        
        
        
I think 517.26 
I did 10 times 3^2 (9) it equals 90. Then 90 times 3.14 and got 282.74. Then did 800- 282.74 and got 517.26