1) Given
2) m∠1 + m∠2 = 90°
3) BD bisects ∠ADC
4) definition of angle bisector
5) definition of congruency
6) m∠1 + m∠3 = 90°
7) ∠1 is complementary to ∠3          (7) definition of complementary
If there is a drop down box, and my answer is not an option, type in the options in the comment box and I will let you know which theorems (or definitions) are the same as my answer.
 
        
                    
             
        
        
        
Answer:
sin ∠D = 24/25
Step-by-step explanation:
sin = opposite / hypotenuse 
Looking at ∠D, the opposite side is 24, hypotenuse is 25
Therefore sin = 24/25
 
 
        
             
        
        
        
Im thinking it's false. 18 isn't even between 4 and 9.
        
                    
             
        
        
        
It is true hope this helped
        
                    
             
        
        
        
2x - 3 < 11 or 8x -10 < 82:  <span>X < 23/2
<span>
Part 1</span>
</span>2x-3<11
Add 3 both sides
2x-3+3<11+3
Refine
2x<14
Divide by 2 on both sides
2x / 2    /   14 / 2
Refine
x < 7
<span>
Part 2</span>
8x-10<82
Add 10 to both sides
8x-10+10<82+10
Refine
8x<92
Divide by 8
8x / 8   /   92 / 8
Refine
x < 23 / 2