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Answer :

Diameter = AB

= AC + CB = r + r = 2r

- Q.1 The side of an equilateral triangle is shown by l. Express the perimeter of the equilateral triangle using l.
- Q.2 The side of the regular hexagon (Fig 11.10) is denoted by l. Express the perimeter of the hexagon using l. (Hint: A regular hexagon has all its six sides equal in length.)
- Q.3 A cube is three dimensional figure as shown in Fig 11.11. It has six faces and all of them are identical squares. The length of an edge of the cube is given by l. Find the formula for the total length of the edges of a cube.
- Q.5 To find sum of three numbers 14, 27 and 13 we can have two ways: (a) We may first add 14 and 27 to get 41and then add 13 to it to get the total sum 54 or (b) We may add 27 and 13 to get 40 and then add 14 to get the sum 54. Thus, (14 + 27) + 13 = 14 + (27 + 13)

- NCERT solutions for class 6 maths chapter 1 Knowing Our Numbers
- NCERT solutions for class 6 maths chapter 2 Whole Numbers
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- NCERT solutions for class 6 maths chapter 4 Basic Geometrical Ideas
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- NCERT solutions for class 6 maths chapter 11 Algebra
- NCERT solutions for class 6 maths chapter 12 Ratio and Proportion
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