Area of the circle is πr² which corresponds to an angle of 360° subtended at the center. Thus, the area of a sector subtending angle 
at the centre is:
In this case put $\theta$ equal to 30°
Step-by-step answer:
It is a glide reflection.
The order of sliding and reflection is not important if the gliding is parallel to the line of reflection, which is the case here.
So the equivalent is translate five units down, and then reflect over the y-axis.
Note in general that rotations will not be equivalent to an odd number of reflections. So looking for an equivalent, look for reflection.
Answer:
Sue of estimates = 6200
Step-by-step explanation:
can be estimated as 
which is 
Similarly 
can be estimated as 
which is 
∴ Sum of estimates = 
Answer:
x=3
Step-by-step explanation:
3x=129 , x =43 distribute 3 to get x by itself
