Circle s is shown. line segment r t is a diameter. the length of s t is 4. sector r s t is shaded. the measure of central angle rst is radians. what is the area of the shaded sector? 4pi units squared 8pi units squared 16pi units squared 20pi units squared

8\pi units^{2}

Step-by-step explanation:

The shaded sector is half the area, because its divided in two parts by the diameter, which is in the middle. So, one way we could get the answer is finding the total area, then divide it by two, like this:

Then, the shaded sector is half:

Therefore, the correct answer is the second option.

Solution:

we have been asked to find that whether the given statement is True or False.

The given statement is

Fractions must have a common denominator in order to subtract them.

Answer is False.

Suppose we have been asked to subtract half from one.

Here the denominator is not common but still it can be subtracted and the result is

Making denominator common makes your calculation work easy. That's the only advantage.