A square is inscribed in a circle. How much larger is the area of the circle than the area of the square?
1 answer:
Answer:
π/2 : 1 or π : 2
Step-by-step explanation:
In the attachments I have a picture of a square inscribed in a circle.
Call the side of the square a. Therefore, the area of the square is a^2.
We can also see that the diagonal of the square is the circle's diameter.
Using the Pythagorean Theorem we find that the diagonal/diameter of the circle is a√2. Thus the radius is that divided by 2, which is (a√2)/2.
We also know that the formula for a circle's area is πr^2, so the area of the circle is π((a√2)/2)^2 --> π(a^2)(2)/4 --> π(a^2)/2.
Hence the ratio of the circle to the square is π(a^2)/2 to a^2 which is π/2 to 1 or π to 2.
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Answer:
y = 250
Step 1:
To solve, we plug in 50x for y.
Then, we subtract the 10x from the right side. Our goal is to get the x by itself first.
Then, we divide both sides by 40, since we have to get the x by itself.
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Step 2:
Now that we found x, we plug in 5 to the original equation and solve from there.
y = 250