What is the radius of a circle with 9cm?
What is the radius of a circle with 9cm?
The answer is 9.42 cm.
What is the diameter of 9cm circumference?
28.27 cm exactly or limited to de precision of this calculator (13 decimal places).
Which best represents the circumference of a circle with a radius of 12 inches?
The formula for the circumference of a circle is C = 2πr, so the circumference of this circle can be represented by C = 2π(12). This simplifies to C = 24π.
What is the radius of a circle with a circumference of 7 850?
To do so we divide the circumference by pi. Since the radius is half the diameter, we just divide this number by 2. The radius of this circle is 1250 unites. I hope this helps!
What is the radius of 12 inch?
≈38 and A. ≈113 . First you need to find the radius, the key term to find the radius is diameter=2⋅radius ; therefore the radius r is 122=6 inches.
What is the area of 12 inch circle?
Circumference & Areas
| Size in Inches | Circumference Inches | Area in Square Inches |
|---|---|---|
| 12 | 37.700 | 144.000 |
| 12 1/4 | 38.480 | 150.060 |
| 12 1/2 | 39.270 | 156.250 |
| 12 3/4 | 40.060 | 162.560 |
What best describes the diameter of a circle?
Which best describes the diameter of a circle? The distance across the middle of the circle.
What is a radius and diameter?
Radius: A circle’s radius — the distance from its center to a point on the circle — tells you the circle’s size. Diameter: A chord that passes through a circle’s center is a diameter of the circle. A circle’s diameter is twice as long as its radius.
How to find the radius of a circle?
The radius is 14 units. Start by finding the diameter; the formula for circumference is πd, so set up an equality: Diameter is twice as large as radius, so divide your diameter by 2 to get radius. Therefore, your radius is 14 units.
Is the area and circumference of a circle the same thing?
The circumference of a circle is defined as pi x 2 x radius, or pi x diameter. The area is pi x radius squared. Therefore, for real circles, these values can only be the same if the diameter measure is the same as the radius squared. This works is the radius is 1 or 2. Is the Area of a circle and circumference of a circle have the same thing?
Which is the correct formula for the diameter of a circle?
The diameter of a circle is the length of the line starting from one point on a circle to another point and passing through the center of the circle. It is equal to twice the radius of the circle. It is usually denoted by ‘d’ or ‘D’. Diameter = 2 x Radius. Or Radius = Diameter/2. Diameter is the longest chord of the circle.
Which is the longest chord of a circle?
It is equal to twice the radius of the circle. It is usually denoted by ‘d’ or ‘D’. Diameter is the longest chord of the circle. Also, we can express the area and circumference of a circle with respect to the diameter.
How big is a circle with a radius of 9?
A circle of radius = 9 or diameter = 18 or circumference = 56.55 meters has an area of: 0.0002545 square kilometers (km²) 254.5 square meters (m²)
How to calculate the circumference of a circle?
The formula for the circumference of a circle is. #=2 pi r#. The radius #=9 cm#. circumference #=2 pi r#.
How to calculate the radius of a sphere?
Sphere surface area to radius calculator. User Guide. This tool will calculate the radius of a circle from the circumference, and will convert different measurement units for circumference and radius. Formula. The formula used to calculate the circle radius is: r = C / (2 · π) Symbols. r = Circle radius. C = Circle circumference.
How big is a circle in square meters?
A circle of radius = 9 or diameter = 18 or circumference = 56.55 meters has an area of: 0.0002545 square kilometers (km²) 254.5 square meters (m²) 2.545 × 10 6 square centimeters (cm²)