Answer:
r = √(A/π)
Substitute area into "A", then solve:
Divide A by π, then find the square root of that number.
Explanation:
With the area of a circle, you can find the radius by rearranging its formula.
Area of a circle: A = πr²
<u>Rearrange the formula to isolate "r"</u>.
A = πr²
A/π = πr²/π Divide both sides by π
A/π = r² π divided by π cancels out on the right
√(A/π) = √r² √ both sides to cancel out ²
√(A/π) = r Write "r" on the left for standard formatting
r = √(A/π) Formula for find radius
If you have the area, use this formula.
- Substitute "A" with the area.
- Divide A by π
- Find the square root of that number
Answer:
3,535 cm
Step-by-step explanation:
55cm=88km
Let's make that "one unit" - 55cm=1 unit. How many units are in the distance 5656km?
5656km/88km=64.2727... units.
55cmx64.2727... = 3,534.999 cm (depending on what your teacher requires, we can probably round to 3,535).
Therefore, we know that the two cities are 3,535 cm apart on the map.
Answer:
22%
Step-by-step explanation:
100% - ( 154 / 175 )
1.00 - (0.88)
0.22 -------> 22%
Answer:
4. 158
Step-by-step explanation:
First let's make things a little simpler and put these arcs in terms of x. We know that the degree measure around the outside of a circle, regardless of its size, is 360. So let's say that arc BC is x. That means that arc BDC is 360 - x. This is because arc BC + arc BDC = 360. Substituting in our x's we have:
x + 360 - x = 360 and
360 = 360. (That's just the proof that putting in our x's as we did does in fact work!)
Following the formula then, we have
and
Multiply both sides by 2 to get rid of the fraction and get
44 = 360 - 2x
Subtract 360 rom both sides to get
-316 = -2x
Divide both sides by -2 to get that x = 158
Since we are looking for arc BC and we designated arc BC as our x, that means that arc BC = 158.
42/48 is equivalent to 7/8
