Because all circles have the same shape, their different measurements are related by a set of simple equations. If you know the radius, diameter, area or circumference of a circle, it is fairly easy to find any of the other measurements. Step 1 Learn the formulas relating radius to circumfe...
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...
The formula for calculating the area of a circle is: Area = π * r²Where "Area" is the circle's area.(pi) is a Mathematical constant with an approximate value of 3.14159. r is the radius of the circle, which is the distance squared (raised to the power of 2) from the circle'...
Find the area inside the circle r=2 \cos(\theta) and outside the circle r=1 . If the area of a circle is equal to the area of a square with side 2 sqrt(pi), what is the diameter of the circle? If the area of a circle is A = (pi)r^2, what is the radius in terms of...
To find the radius of a circle given its area, we can follow these steps: 1. Identify the formula for the area of a circle: The area A of a circle is given by the formula: A=πR2 where R is the radius of the circle. 2. Set the area equal to the given value: We know ...
To find the area of a circle, you take pi times the radius squared, or A = pi r^2. Using this formula, you can find the area of a circle if you know the radius — or the diameter — by plugging in your values and solving for A. Pi is approximated as 3.14. ...
Circle:For any given three points, the distance of the points from the center of the circle are always equal. So, using distance formula between two points, the coordinates of center can be determined.Answer and Explanation: In this problem, we are given the three points. Let the points ...
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
Find the center and radius for the circle(x^2)+(y^2)-4x=0. A. ( 0,2 ),2 B. ( 2,0 ),4 C. ( -2,0 ),2 D. ( 2,0 ),2 相关知识点: 平面解析几何 圆与方程 圆的标准方程 圆的一般方程 试题来源: 解析 D 【分析】本题考查圆的方程,把圆的一般方程化为标准方程即可求解,...
Find the radius, r cm, of a circle, given that a sector of the circle has an area of (9π )8 cm2 and the sector subtends an angle of (π )4 radians at the centre of the circle. 相关知识点: 试题来源: 解析 3 cm 反馈 收藏 ...