A chord is a straight line that connects two points on the circumference of the circle without passing through the center. If the line passes through the center of the circle, it is a diameter. To calculate the chord length, you need to know the radius and either the central angle or th...
Discover how to find the area and circumference of a circle. Learn the area of a circle formula, the circumference of a circle formula, how to calculate the circumference of a circle, and how to calculate the area of a circle. Related to this QuestionFind the area of the circle given be...
How to Find Angles in a Circle Lesson Summary Frequently Asked Questions How can the angle of an arc be found? The angle measure of an arc is the same as the measure of the two line segments that intersect to define it. That angle is opposite the arc it creates on that circle's ci...
The examples below demonstrate how to use the PI function in Excel. # Example 1 To return the result of pi, just enter the formula below into a cell (such as D6 in this case), and then pressEnter. =PI() # Example 2 To calculate the area of a circle with the radius provided in...
Angular diameteris, in fact, an angle, not a diameter. It is the angle that an object "takes up" as seen by an observer at a specified distance. This can be measured indegrees(°) orradians(rad). One circle takes up 360° and 2π rad, so 1 rad = 360/2π = 57.3°. ...
The sine of an angle is given by the quotient between the opposite side and the hypotenuse of a right triangle. This quotient, as well as other types of quotients, are known as trigonometric ratios. These trigonometric ratios are basic tools used in trigonometry to study right triangles, ...
First, make a circle in the middle of the hexagon. You know a circle is 360 degrees around. So all you have to do is divide that by six angles. 360° ÷ by 6 = 60° The measure of the central angle of a regular hexagon is 60 degrees. ...
To calculate the other angles, we need the sine, cosine and tangent. In fact, the sine, cosine and tangent of an acute angle can be defined by the ratio between sides in a right triangle. Just like every other triangle, a right triangle has three sides. One of them is the hypothenus...
Then its easy to find the arc length using the suitable formula. Example: Calculate the arc length of a curve, whose endpoints touch a chord of the circle measuring 5 units. The central angle subtended by the arc is 2 radians. We have, ...
which is usually denoted with the Greek letter π, is the ratio of the circle's circumference to its diameter, or approximately 3.14. Pi is the fixed ratio used to calculate the circumference of the circle