Plug in the area to find the radius if you know the area. If a = pi r^2 then r = the square root (sqrt) of the area divided by pi, or to put it in mathematical script, sqrt(a/pi). So, if the area is 3.14, we get: r = sqrt(3.14 / 3.14) r = sqrt(1) r = 1 Refe...
What is the formula to find the radius? If the diameter of a circle is known then the formula for radius is diameter divided by 2. If the circumference of a circle is known then the formula for radius is the circumference divided by 2 pi. And if the area of a circle is known then...
How To Find A Radius For Hollow Objects? The radius of a sphere or a circle is the distance from its center to its circumference. For any regular polygon, the radius is the same from the center to all its vertices. A circle is a regular polygon where the distance from the center to ...
The midpoint of a line is the halfway mark of that line. A radius measures the distance from a circle's middle point, or origin, to its surrounding perimeter, also known as its circumference. The midpoint has much in common with the radius, for the midpoint on a diameter measures its...
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: ...
Solved Examples on Diameter of a Circle Example 1: If the radius of a circle is 30 cm, find its circumference. Solution: r = 30 cm Use the formula to find the circumference of a circle: C = 2\(\pi r\) [Write the formula] = 2 x 3.14 x 30 [Substitute the value of r and \...
How to find the radius of a circle from the segment? Properties of Circle: In a circle if a segment is know, then we know the length of the chord that forms the segment and also the height of the segment, height is the perpendiculat distance of centre of the chord from the arc of...
Related to this Question How to find the radius of a circle from the given two-points? How to find the radius of a circle from the segment? How do you find the center and radius of the circle given (x - 3)^2 + (y - 1)^2 = 25?
To find the area of a circle inside a right angled triangle, we have the formula to find the radius of the right angled triangle, r = ( P + B – H ) / 2. Given
In this formula, r is the radius of the circle. The image below shows what we mean by radius: How to Find the Area of a Circle Finding the area of a circle is easy. Question What is the area of a circle with a radius of 5 cm, as shown below? Step-by-Step: 1 Start with...