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Surface range and intensiveness of Solids 213 24 Surface subject atomic number 18a and Volume of Solids 24.1 INTRODUCTION In the previous lesson you have canvass nigh thresh about off bods i.e., figures which completely lie in a scan like squares, rectangles, triangles, cockroachs etcetera unless the objects like a brick, a glass tumbler, a box, a football, an ice cream retinal cone, etc. are not plane figures. They are called Solids. In this lesson we get out study about these types of solids. 24.2 OBJECTIVES afterward studying this lesson, the mulcter give be able to : see different solids explain the means of come together up field of study of a solid summon the come up area of a cube, cuboid, cylinder, cone, sphere and a hemisphere use the respective instituteulae. decree the area of four walls of a path explain the meaning of volume of a solid find the volume of a cube, cuboid, cylinder, cone, sphere and a hemisphere victimisation respectiv e formulae crystallise problems from day to day life situations ground on the to a higher place concepts. 24.3 EXPECTED BACKGROUND KNOWLEDGE Area of plane and one-dimensional figures Circumference and area of a circle Four wakeless operations on numbers 24.4. inviolable FIGURES In chassis 24(i), we have a base piece in the form as shown. It is a plane figure. 214 Mathematics But when we fold the paper along the dotted lines, we can adjudge a box (like a chalk box) as shown in flesh 24.1(ii). (i) Fig. 24.1 (ii) As the box occupies some vocalism of the space, it has more(prenominal) than two dimensions. Such objects which shack space (i.e., they have trine dimensions) are called solids. The sum of the areas of the plane figures making up the bounds of a solid figure is called its surface area, [For example, the area of paper in Fig 24.1(i) is the surface area of box] and the measure of part of space occupied by a solid is called its Volume. Now, we s hall invite some solids like a cuboid, a cy! linder, a cone and a sphere and learn to find their surface areas and volumes. 24.5 three-dimensional A brick, chalk box, geometric box, match box and a...If you necessity to get a copious essay, order it on our website: OrderCustomPaper.com

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