How do you get the radius of a circle if the given is only diameter?
Just remember to divide the diameter by two to get the radius. If you were asked to find the radius instead of the diameter, you would simply divide 7 feet by 2 because the radius is one-half the measure of the diameter. The radius of the circle is 3.5 feet. You can also use the circumference and radius equation.
How do you get the radius of a circle?
How to Find the Radius of a Circle?
- When the diameter is known, the formula for the radius of a circle is: Radius = Diameter / 2.
- When the circumference is known, the formula for the radius is: Radius = Circumference / 2π
- When the area is known, the formula for the radius is: Radius = ⎷(Area of the circle / π)
How do you find the radius of a circle with the diameter and circumference?
Multiply the radius by 2 to get the diameter. Multiply the result by π, or 3.14 for an estimation. That’s it; you found the circumference of the circle.
What is the diameter of a circle with 9 cm?
What is the area of a circle with diameter 9 cm
| Result: The area of a circle with diameter 9 is 63.62 | |
|---|---|
| Formulae: | |
| r = 4.5 d = 9 C = 28.3 | A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter |
What is the length of the radius of the circle?
Explanation: The definition of radius of a circle is the length of the line segment from the center of a circle to a point on the circumference of the circle. So, the radius is half the length of the diameter.
What is the area of the radius is 9 cm?
The area of a circle is equal to Pi π times the radius r squared. Substitute in the value of the radius r=9 into the formula for the area of a circle. Pi π is approximately equal to 3.14 . Raise 9 to the power of 2 .
How to calculate the size of a circle?
1 The diameter – defined above 2 The radius – the distance from the circle’s center or origin to the edge, one half the diameter 3 The circumference – the length of the outside boundaries of the circle
Which is larger the radius or the diameter of a circle?
The diameter of a circle is the distance from edge to edge of a circle passing through its origin or center. Conveniently, it is twice as long as the radius of a circle.
What are the three dimensions of a circle?
There are three dimensions most often used to describe a circle: 1 The diameter – defined above 2 The radius – the distance from the circle’s center or origin to the edge, one half the diameter 3 The circumference – the length of the outside boundaries of the circle More