Hello:
I am having difficulty witht the following math:
Question #1 If the area of a circle is 27 sq. in. What is the radius? I am coming up with an answer of 13.5 sq. in. Is that correct? If not, can you show me step by step how to get the answer?
Question #2 If the area of a circle is 108 cm to the second power, what is the radius?
Thanks.
Grade 5, that's pretty tough
The area of a circle is pi times the radius squared, so work it backwards
divide 27 by pi (on calculator) = 8.594
now take the square root of that to get a radius of 2.93 inches.
your answer is in square inches, that makes no sense.
How did you get 13.5 ?
Do the second question the same way as I showed you for the first, you should get 5.863
If your circle is 27 sq in. Here is how you would work it out to find the radius.
A(area)=3.14(pie) times R(radius) times R
27sq in. = 3.14 x R x R=
27sq in/3.14 x R x R=
8.59 sq in x R =
8.59 sq rt= 2.93
So your radius = 2.93
hope this helps
i need help with my home work so whats another name for 3/8? and whats another name for 5/12 and whats another name for 6/10??? thank you
I'm in the 1st grade! no joke! And Wendy the answer is For five tenths is one half!
Hello!
Let's solve each of the questions step by step:
Question #1: If the area of a circle is 27 sq. in., what is the radius?
To find the radius of a circle when given the area, you can use the formula:
A = πr²
where A is the area and r is the radius.
In this case, we know that the area (A) is 27 sq. in. So we can plug in the values into the formula:
27 = πr²
To find the radius, we need to isolate r. We can divide both sides of the equation by π:
27/π = r²
Now, to get the radius (r), we need to take the square root of both sides of the equation:
√(27/π) = r
Calculating the right side of the equation, we get:
r ≈ 3.082 sq. in. (approximately)
So, the correct answer for the radius is approximately 3.082 sq. in., not 13.5 sq. in.
Question #2: If the area of a circle is 108 cm², what is the radius?
We can use the same formula as before:
A = πr²
where A is the area and r is the radius.
In this case, we know that the area (A) is 108 cm². Let's plug in the values:
108 = πr²
To find the radius, we need to isolate r. Divide both sides of the equation by π:
108/π = r²
Now, take the square root of both sides of the equation:
√(108/π) = r
Calculating the right side of the equation, we get:
r ≈ 5.207 cm (approximately)
So, the correct answer for the radius is approximately 5.207 cm.
I hope this helps! If you have any further questions, feel free to ask.