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A circle is a 2-dimensional closed shape that has a curved side whose ends meet to form a round shape. The word ‘Circle’ is derived from the Latin word 'circulus' which means a small ring. Let us learn more about the circle definition, the circle formulas, and the various parts of a circle with a few circle practice problems on this page.
- Secant
Secant of a circle is the line that cuts across the circle...
- Secant
Mar 16, 2017 · To find the . circumference of a circle, the equation of 2π x R = C. It should be clear that the radius of a circle is the most important measurement. Finding this measurement makes it possible to determine any other geometric property of a circle by using the correct equation. This is proven further when we try to find the area of the circle.
- What Is A Circle?
- Center of A Circle
- Interior and Exterior of A Circle
- Semicircle
- Quarter Circle
- Parts of A Circle
- Circle Formulas
- Solved Examples on Circle
A circle is a round-shaped figure that has no corners or edges. In geometry, a circle can be defined as a closed shape, two-dimensional shape,curved shape. A few things around us that are circular in shape are a car tire, a wall clock that tells time, and a lollipop.
The center of a circle is the center point in a circle from which all the distances to the points on the circle are equal. This distance is called the radius of the circle. Here, point P is the center of the circle.
Consider the circle with center P and radius r. A circle has an interior and an exterior region. All those points for which the distance is less than the radius of a circle lie in the interior of the circle. For example points P, Q, and R lie in the interior of the circle. All those points for which the distance is greater than the radius of a circ...
Semi means half, so semicircle is half a circle. It is formed by cutting a whole circle along a line segment passing through the center of the circle. This line segmentis called the diameter of the circle.
Quarter means one-fourth. So, a quarter circle is a quarter of a circle, formed by splitting a circle into 4 equal parts or a semicircle into 2 equal parts. A quarter circle is also called a quadrant.
The Radius of a Circle: A radius is a line segment with one endpoint at the center of the circle and the other endpoint on the circle. Radius = Diameter2 Diameter of a Circle: A line segment passing through the center of a circle, and having its endpoints on the circle, is called the diameter of the circle. Diameter = 2 × radius Circumference: The ...
Area of a circle: The area of a circle is the region enclosed inside the circle. The area of a circle depends on the length of its radius. Area = πr2 Circumference: The distance around the circle is the circumference of the circle. Circumference = 2πr The value of π = 3.14 or 227
Example 1: Match each term with the correct definition. Solution: 1 – b 2 – d 3 – a 4 – c Example 2: Use the figure to answer the questions. 1. Which term best describes OE? 2. Name 3 line segments that have the same length. 3. Name the secant. 4. Which two terms can be used to describe AB? Solution: 1. Radius 2. OA, OB, and OE 3. PQ 4. Diameter an...
Circles possess unique properties that set them apart from other geometric shapes: 1. Constant curvature. A circle's curvature remains consistent throughout its circumference. This means that no matter where you measure it, the curve will always have the same degree of curvature. 2. 360 degrees. A circle encompasses a total of 360 degrees.
One of the important shapes in geometry is the circle. A geometry-based exam will have most of the questions consist of rectangles, triangles, and circles. We’ve all seen circles before. They have this perfectly round shape, which makes them perfect for hula-hooping! This article will explain what a circle is, its properties, and its parts.
A line that "just touches" the circle as it passes by is called a Tangent. A line that cuts the circle at two points is called a Secant. A line segment that goes from one point to another on the circle's circumference is called a Chord. If it passes through the center it is called a Diameter. And a part of the circumference is called an Arc.
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The circle is the shape with the largest area for a given length of perimeter (see Isoperimetric inequality). The circle is a highly symmetric shape: every line through the centre forms a line of reflection symmetry, and it has rotational symmetry around the centre for every angle.
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