Table of Contents
How do you find the area of a central angle of a circle?
If the central angle measures 60 degrees, divide the 360 total degrees in the circle by 60. Multiply this by the measure of the corresponding arc to find the total circumference of the circle. Use the circumference to find the radius, then use the radius to find the area.
How do you find the area enclosed by a circle?
In geometry, the area enclosed by a circle of radius r is πr2.
How will you determine the area of a sector of a circle if the central angle is measured in radians?
Similar to arc length, the ratio of A to the area of the entire circle is the same as the ratio of θ to one revolution. In other words, again using radian measure, area of sectorarea of entire circle = sector angleone revolution⇒Aπr2 = θ2π .
What is the central angle of a circle called?
A central angle is an angle whose apex (vertex) is the center O of a circle and whose legs (sides) are radii intersecting the circle in two distinct points A and B. The central angle is also known as the arc’s angular distance.
What is the distance from the center of a circle to any point on the circle?
A circle has a center and all of the points on the circle lie the same distance from the center. The distance from a point on the circle to its center is called the radius of the circle.
How do you find the area of a circle with a sector area and central angle?
Sector area formula The formula for sector area is simple – multiply the central angle by the radius squared, and divide by 2: Sector Area = r² * α / 2.
How many central angles can a circle have?
Let’s see it below. An angle of a circle is an angle that is formed between the radii, chords, or tangents of a circle. We saw different types of angles in the “Angles” section, but in the case of a circle, there, basically, are four types of angles. These are central, inscribed, interior, and exterior angles.