What is the formula to find the center of a circle?

What is the formula to find the center of a circle?

We know that the general equation for a circle is ( x – h )^2 + ( y – k )^2 = r^2, where ( h, k ) is the center and r is the radius.

How do you find the radius of a circle with the center?

The center-radius form of the circle equation is in the format (x – h)2 + (y – k)2 = r2, with the center being at the point (h, k) and the radius being “r”. This form of the equation is helpful, since you can easily find the center and the radius.

How will you determine the equation of the circle given the center and radius?

The equation of a circle written in the form (x−h)2+(y−k)2=r2 where (h,k) is the center and r is the radius. The circle centered at the origin with radius 1; its equation is x2+y2=1.

What is the circumference with a radius of 4?

1 Answer. The circumference is 8πcm or 25.12cm .

How do you find the radius from the 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.

How do you find the radius with the diameter?

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..

Is a radius half the diameter?

Half of the diameter, or the distance from the midpoint to the circle border, is called the radius of the circle (r).

How do you convert diameter to area?

User Guide

1. Formula. The formula used to calculate circle area is: A = π x (ø/ 2)2
2. Diameter of Circle. Enter the diameter of a circle.
3. Area of Circle. This is the area contained within a circle with the specified diameter.

What is the diameter of a 60mm circle?

What is the area of a circle with diameter 60 mm?

Result: The area of a circle with diameter 60 is 2827
Formulae:
r = 30 d = 60 C = 189	A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

What is the diameter of a 20 inch circle?

What is the circumference of a circle with a diameter of 20 in? How far around is a circle that is 20 inches across?…Circumference of a 20 Inch Diameter Circle.

62.832	inches
5′ 2.832″	feet and inches
1.5959	meters
159.59	centimeters

What is the diameter of a 23 inch circle?

What is the area of a circle with a DIAMETER of 23 inches (radius of 11.5 inches)?…Area of a 23 Inch Circle.

415.48	square inches
0.26805	square meters

What is the area of a 28 diameter circle?

Here is the answer to questions like: how to find the area of a circle with diameter 28 inches?…What is the area of a circle with diameter 28 inches?

Result: The area of a circle with diameter 28 is 615.8
Formulae:
r = 14 d = 28 C = 88	A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

What’s the diameter of a circle?

2 x radius

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 Radius and Diameter?

The diameter is a straight line that passes through the center of the circle. The radius is half of the diameter. It starts from a point on the circle, and ends at the center of the circle.

What is the radius if the diameter is 16?

1 Answer. Mark D. If the 16 cm is the diameter then the radius is 8 cm.

What is the radius of the diameter is 13?

∴ , the radius is 132 units or 7.5 units.

What is the diameter of a 7cm circle?

Answer. Here,diameter is 7 cm. So radius is 7/2=3.5 cm.

What is the area of a 7cm circle?

So, area of the given circle =π×7×7=49π

What is the circumference of a 7ft circle?

What is the circumference of a circle with a diameter of 7 ft?…Circumference of a 7 Foot Diameter Circle.

21.991	feet
670.29	centimeters

What’s the area of a 7 inch circle?

Circumference & Areas

Size in Inches	Circumference Inches	Area in Square Inches
6 3/4	21.210	35.780
7	21.990	38.480
7 1/4	22.780	41.280
7 1/2	23.560	44.180

What is the area of a 8 inch circle?

How big is a 8 inch circle?…Area of a 8 Inch Circle.

50.265	square inches
324.29	square centimeters
0.032429	square meters