<span>A = 2 * (0.5ab) + b (10 - a) = ab + 10b - ab = 10b 
10b = 30√2; b = 3√2 
sin α = 3√2 / 6; α = 45 degrees 
Small angle: 45°; Large angle: 135°</span><span>
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Answer:
6 feets 
Step-by-step explanation:
The triangle described in the question has been sketched in the picture attached below :
From the triangle, we could solve for X, which is the base of the triangle using trigonometry :
Sinθ = opposite / hypotenus
Sin 30° = x / 12
0.5 = x / 12
x = 12 * 0.5
x = 6 feets
Hence base, x = 6 feets 
 
        
             
        
        
        
Answer:
1.7
Step-by-step explanation: