Step-by-step explanation: To find the area of a circle, start with the formula for the area of a circle.
Area = ![\pi r^{2}](https://tex.z-dn.net/?f=%5Cpi%20r%5E%7B2%7D)
Notice that the radius of the circle is 8 inches, so we can plug a 8 in for the radius in our formula.
Area = ![(\pi) (8 in.)^{2}](https://tex.z-dn.net/?f=%28%5Cpi%29%20%288%20in.%29%5E%7B2%7D)
Now, (8 in.)² is equal to 8 inches × 8 inches or 64 inches².
Area = 64π in.²
So, the area of the circle is 64π in.².
Now, remember that π is approximately equal to 22/7 of 3.14. This means that we can estimate the area of the circle by plugging in 3.14 for π.
Area = (64) (3.14)
Area = 200.96 in.²
Therefore, the exact area of the circle is 200.96 in.².
Answer:
x + y -z = 6
Step-by-step explanation:
The equation of the line can be rewritten as ...
(x, y, z) = (2, -3, 0) +t(1, 1, -1)
The direction vector of the line tells you the coefficients of the variables in the equation of the plane. The constant in that plane equation will be the value required to make it pass through the given point.
x + y - z = (-1) +(4) -(-3)
x + y - z = 6 . . . . equation of the plane