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Asked by: Ronaldo Deckow
Updated: 11 August 2021 03:17:00 PM

# How to find the diameter of a circle without the radius?

Divide the circumference (perimeter) by pi. That gives you the diameter. Half of that is the radius. To get the area, square the radius, and then multiply by pi.

## In this regard, how do you find the radius if you know the circumference?

How do I find the radius from the circumference?
1. Divide the circumference by π, or 3.14 for an estimation. The result is the circle's diameter.
2. Divide the diameter by 2.
3. There you go, you found the circle's radius.

## Considering this how do you find the radius with 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. You can also use the circumference and radius equation.

## From these considerations, how do you find the radius of a curve?

Method to Calculate Radius
To calculate the radius of an arc, take the height -- "H" -- of the arc and divide it by two. Call the result "C." Now take the width -- "W" -- of the arc and square it by multiplying it by itself.

## Do you have your own answer or clarification?

### Related questions and answers

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

Note that the radius squared is on the left-hand side of the equation. The equation of a circle with center (a,b) and radius r is (x−a)2+(y−b)2=r2.

#### What is the diameter of a 24cm circle?

What is the area of a circle with diameter 24 cm?
Result: The area of a circle with diameter 24 is 452.4
Formulae:
r = 12 d = 24 C = 75.4A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

#### What is a diameter and radius?

Radius, Diameter and Circumference
The Radius is the distance from the center outwards. The Diameter goes straight across the circle, through the center. The Circumference is the distance once around the circle.

#### Is a radius half the diameter?

The radius is half the diameter, or . The diameter of this circle is 36 feet, so the radius is feet. The radius is 18 feet. The distance around a circle is called the circumference.

#### What is the diameter of a 23 inch circle?

Diameter of a Circle
Diameterin2ft2
23.0 in415.52.885
23.1 in419.12.910
23.2 in422.72.936
23.3 in426.42.961

#### What is the diameter of a 90 inch circle?

What is the area of a circle with diameter 90 inches?
Result: The area of a circle with diameter 90 is 6362
Formulae:
r = 45 d = 90 C = 283A = 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 100 millimeter circle?

So your diameter is going to be 200 millimeters. Hope this helps!

#### What is the radius of a 12 inch circle?

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.

Circle/Diameter

#### What is the radius of the diameter is 4?

Use the diameter to find the radius by dividing the diameter by 2. For example, if the diameter is 4, the radius would be 2.

#### What is the radius and diameter of the following circle 13?

∴ , the radius is 132 units or 7.5 units.

#### What is radius of a curve?

In differential geometry, the radius of curvature, R, is the reciprocal of the curvature. For a curve, it equals the radius of the circular arc which best approximates the curve at that point. For surfaces, the radius of curvature is the radius of a circle that best fits a normal section or combinations thereof.

#### What is the diameter of a 20 foot circle?

Diameter of a Circle
Diameterftm
20′0″62.8319.15
20′1″63.0919.23
20′2″63.3619.31
20′3″63.6219.39

#### What is the radius of a 5 inch circle?

=25π or approximately 78.54 square inches.

#### How big is a 10mm circle?

9mm = almost 3/8 inch. 10mm = just over 3/8 inch.

#### What is the diameter of a 14cm circle?

What is the area of a circle with diameter 14 cm?
Result: The area of a circle with diameter 14 is 153.9
Formulae:
r = 7 d = 14 C = 44A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

#### How do you find the radius of a circle given two points?

According to the distance formula, this is √(x−0)2+(y−0)2=√x2+y2. A point (x,y) is at a distance r from the origin if and only if √x2+y2=r, or, if we square both sides: x2+y2=r2. This is the equation of the circle of radius r centered at the origin.

#### What is the area of a 25 diameter circle?

Area of a 25 Inch Circle
490.87square inches
3.4088square feet
0.37876square yards
3,166.9square centimeters
0.31669square meters

#### What is the radius of a circle of 6 units?

Given : The diameter of a circle is 6 units. To find : What is the radius of the circle? Substitute the value, Therefore, the radius of the circle is 3 unit.

#### What size is 24 cm in inches?

Centimeters to Inches table
CentimetersInches
21 cm8.27
22 cm8.66
23 cm9.06
24 cm9.45

#### 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.

#### How do you convert diameter to area?

The area of a circle is the amount of space the circle covers. The formula for calculating the area of a circle is A = π​r​2 where pi (π) equals 3.14 and the radius (​r​) is half the diameter.

#### What is the diameter of a 8 foot circle?

Diameter of a Circle
Diameterftm
8′0″25.137.660
8′1″25.397.740
8′2″25.667.820
8′3″25.927.900

#### What is the radius of a 13cm circle?

What is the area of a circle with radius 13 cm?
Result: The area of a circle with radius 13 is 530.9
Formulae:
r = 13 d = 26 C = 81.7A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

#### What is the area of a 24 diameter circle?

Area of a 24 Inch Circle
452.39square inches
3.1416square feet
0.34907square yards
2,918.6square centimeters
0.29186square meters