Hello from MrBillDoesMath!
Answer:
See below
Discussion:
Triangles BAD and BCD are congruent by the SAS postulate.
           * Side AD = DC because BD is the perpendicular bisector  of AC. 
           * Angle ADB and CDB are both right angles, and hence equal, because
             BD is the perpendicular bisector of AC)
Corresponding parts of congruent triangles are equal so angle BAD = angle BCD,  which was to be proven.
Regards,  
MrB
 
        
             
        
        
        
Answer:
x = - 7
Step-by-step explanation:
( x + 139 ) and 132 are vertically opposite angles.
Vertically opposite angles are equal,
x + 139 = 132
x = 132 - 139
x = - 7
 
        
             
        
        
        
Answer:
 <em>75.6</em> 
Step-by-step explanation:
100% - 73% = 27%  
27% = 0.27
280 × 0.27 = <em>75.6</em> 
 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
yw
 
        
             
        
        
        
Answer:
Step-by-step explanation:
<u>We know that:</u>
- Area of shaded region = Area of square - Area of circles
- Radius of circle = 3 in
- Area of circle = πr²
- Area of square = s²
<u>Solution:</u>
- Area of shaded region = Area of square - Area of circles
- => Area of shaded region = (12²) - 4(22/7 x 3 x 3)
- => Area of shaded region = (144) - 4(22/7 x 9)
- => Area of shaded region = (144) - 4(198/7)
- => Area of shaded region = 144 - 792/7
- => Area of shaded region = 144 x 7/7 - 792/7
- => Area of shaded region = 1008/7 - 792/7
- => Area of shaded region = 1008/7 - 792/7
- => Area of shaded region = 216/7 in²