Please send a picture of the figure
        
             
        
        
        
Answer:
- Perimeter of the original Rectangle is
 2(4.5+4.3)=2×8.8= <u>17.6</u><u> </u><u>mm</u>
- Side length of the enlarged rectangle is

- Perimeter of the enlarged rectangle
 2(24.3+23.22)= 2×47.52= <u>95.04 mm</u>
 
        
             
        
        
        
Answer: 45
Step-by-step explanation:
The total degrees in a circle is 360.
The perpendicular angle that you see is 90 degrees, added to angles of x and 3x, you get the total degrees.
so 90 + x + 3x = 90 + 4x = total
90 + 4x = 360
4x = 180
x = 45 degrees
 
        
                    
             
        
        
        
Using sin(A+B) = sinAcosB + cosAsinB
sin20cos40 + cos20sin40 = sin(20+40) = sin60degree
= 
