Transcription of Perimeter and Area - NCERT
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Perimeter and Area - NCERT
Perimeter of a closed figure is the distance around it while area isthe measure of the part of plane or region enclosed by it. Perimeter of a regular polygon = Number of sides Length of oneside. Perimeter of a square = 4 sideFig. Perimeter of a rectangle = 2(l + b)Fig. Area of square = side side Area of rectangle = l b Area of parallelogram = b h Area of triangle = 12b h Fig. Fig. The distance around a circle is known as its circumference. The ratio of circumference and diameter of a circle is a constant andis denoted by (pi). Approximate value of is taken as 227 or Circumference of a circle of radius r is 2 r, Area of a circle of radius r is In Examples 1 and 2, there are four options, out of which one is the correct 1:Following rectangle is composed of 8 congruent WordsNumbersFormulaThe circumference C ofa circle is ti
Cost of cementing 1 m2 path = 200 So, total cost of cementing the path = 780 × 200 = 156000 To become familiar with some of the vocabulary terms consider the following. 1. The word circumference contains the prefix circum-, which means “around”. What do you think about the circumference of a circle? 2.
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