![]() Some examples of rectangle shapes are- mobile screens, blackboard, doors, etc.Īny closed shape made up of at least three-line segments is known as a polygon. The area of a shape is measured in terms of the number of square units such as square feet, square inch, square centimeters and so on. Therefore, the area of a rectangle is equal to the number of unit squares that can fit into the boundaries of a rectangle. The number of unit squares that can fit into any shape, is the area of that shape. (Take the value of π = 3.A quadrilateral whose parallel sides are equal to each other and all the vertices are perpendicular to each other is called a rectangle. Therefore the area of the right-angled triangle formed would be equal to the area of a circle.Īrea of a circle = Area of triangle = (1/2) ×b ×hĮxample- Find the Area and the circumference of a circle whose radius is 10 cm. The outer circle would form a line having length 2πr forming the base. Open all the concentric circle to form a right-angled triangle. We know that Area is the space occupied by the circle.Ĭonsider a concentric circle having external circle radius to be ‘r.’ The circle formula to find the area is given by Refers to the distance around polygons, figures made up of the straight line segment.Ī circle circumference formula is given byĪrea (A)Ěrea of a circle is the amount of space occupied by the circle. Is also sometimes used, although this usually The circle formula is obtained as r= d/2.Ĭircumference (C) The circumference of a circle is defined as theĭistance around the circle. On the circle.” It is twice the length of radius Radius of the circle is denoted by “R” or “r”ĭiameter (d) “ A line segment having both the endpoints Radius (r) “A line segment connecting the centre of aĬircle to any point on the circle itself “. Tangent- A coplanar straight line touching the circle at a single point. Secant- A straight line cutting the circle at two points. Radius- A line segment connecting the centre of a circle to any point on the circle itself. ![]() It is to be noted that segments do not contain the centreīasic Terminology of Circles Centre – It is the midpoint of a circle.Ĭhord- A line segment whose endpoints lie on the circleĭiameter- A line segment having both the endpoints on the circle Segment- A region bounded by a chord and an arc lying between the chord’s endpoints. Sector – A region bounded by two radii and an arc. Parts of CircleĚrc – It is basically the connected curve of a circle (h,k) is the coordinate of the centre of a circleĪnnulusĚnnulus-The region bounded by two concentric circles. The circle formula in the plane is given as: Also, it has rotational symmetry around the centre for every angle. Every line that passes through the circle forms the line of reflection symmetry. If you’ve selected sufficient points, you may notice that the shape is starting to resemble a circle and this is exactly what the definition of a circle is.Ī circle is a closed two-dimensional figure in which the set of all the points in the plane is equidistant from a given point called “centre”. Mark as many points as u want away from point O, but all of them should be exactly 3 cm away from point O. ![]() Using a ruler, keep the reference zero mark on point O and randomly mark 3cm away from point O in all the direction. Select a random length for radius, for example, 3 cm. Take an empty sheet of paper and just mark a single point on the sheet, somewhere in the middle of the sheet, and name it to point O. To understand what circles are in simple terms, go through circles for class 10, and also try the following exercise – In maths projects for class 10 on circles, the construction of a circle and all the properties and terminologies are explained in detail. Arrange the loop until it is exactly circular in shape. Imagine that the line segment is bent around till its ends join. It is similar to the type of line segment. ![]() The circles divide the plane into two regions such as interior and exterior regions. A circle is a special kind of ellipse in which the eccentricity is zero and the two foci are coincident. ![]()
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