Answer:

Step-by-step explanation:
B is false because if two numbers are rational they will always multiply to a rational number.
Answer: 
Step-by-step explanation:
The formula for calculate the area of a Sector of a circle is:

Where "C" is the central angle in degrees and "r" is the radius.
Based on the data given in the exercise, you can identify that:

(See the figure attached)
Then, you can substitute these values into the formula and then evaluate, in order to calculate the area of lawn that receives water.
The result is:

The answer is (c). The picture shows that all of the angles and sides are equal, meaning that it's both equilateral and equiangular.
The third option has the highest value