Which are true about the area of a circle? Check all that apply.
The diameter is used in the formula.
The units are always squared.
The area can be found when given the diameter by first finding the radius.
The area is the distance around the circle.
Circumference can be used to find area.

Sometimes . The diameter is used in the formula.

Tricky.  see explanation.  The units are always squared.

√ The area can be found when given the diameter by first finding the radius.

NO!    The area is the distance around the circle.

√  if you think about it. Circumference can be used to find area.

Step-by-step explanation:

Sometimes the formula is given   A=π(d/2)² . Same as A = πr²

The Area will be expressed in "units squared" Pi is not a square unit. Radius, diameter and circumference are linear units not square units.  So which units does this (vague, tricky) question mean?

If you are given a circumference and divide by Pi, you get the diameter. You can take half the diameter to get a radius.  Square that radius and multiply by Pi to get the Area.

step-by-step explanation:

f(x) = y

f(-3) = -5

step-by-step explanation: