Arc length of sector of circle with radius r and angle θ is (θ/360) x 2 \(\pi r\).
\(\therefore\) Area of the Pizza = 452.16 sq. Thus, area of a circle formula can be used to calculate the area of the pizza.Īrea of Circle formula = \(\pi r^2\) = 3.14 × 12 × 12 = 452.16 To assume: Length of the pizza slice is equal to the radius of the pizza.Ī pizza is circular in shape. Let’s calculate the area of the pizza that was ordered by Prateek: Prateek and his friends order a pizza and each slice was 12 cm in length. Where, C = circumference or perimeter of a circleĪrea of Circle Using Circumference: An Example The perimeter or circumference of a circle is given by a formula C = \(2\pi r\) Radius of the circle can be determined from the diameter and the circumference, which will then help in calculating the area of a circle.įor example: A circle has a radius 'r' then the area of circle = \(\pi r^2\), where \(\pi = \frac\) Any part of a pizza is a segment of a circleĪrea of a circle can be calculated from the diameter and the circumference of a circle. The slice of pizza is just a sector of a circleĪ region bounded by the chord to the curve of a circle is termed a segment. We can understand the sector of a circle easily by taking an example of a pizza. It is the part of the curve of a circleĪ sector is a part of a circle enclosed by two radii of a circle. It is denoted by R or rĪ line segment inside the circle that touches any two points of a circle is called a chordĪ line that passes through any two points on the circle is called the secant of a circle.Ī line that passes through any single point on the circle is called the tangent of a circleĪn arc is a fraction of the whole circumference of any circle. In other words, the radius is just half of the diameter of a circle. It is the longest chord in any circle and is denoted by D or dĪ line segment that touches the center and any point of the circle is called the radius of a circle. A point situated in the middle of the circle is called the center of a circleĪ straight line segment that passes through the center of the circle and touches the outer surface of the circle is called the diameter of a circle.
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