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To construct a triangle similar to a given ∆ABC with its sides 73 of the corresponding sides of ∆ABC, draw a ray BX making acute angle with BC and X lies on the opposite side of A with respect to BC - Mathematics

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Question

To construct a triangle similar to a given ∆ABC with its sides `7/3` of the corresponding sides of ∆ABC, draw a ray BX making acute angle with BC and X lies on the opposite side of A with respect to BC. The points B1, B2, ...., B7 are located at equal distances on BX, B3 is joined to C and then a line segment B6C' is drawn parallel to B3C where C' lies on BC produced. Finally, line segment A'C' is drawn parallel to AC.

Options

  • True

  • False

MCQ
True or False

Solution

This statement is False.

Explanation:


Steps of construction:

  1. Draw a line segment BC.
  2. With B and C as centres, draw two arcs of suitable radius intersecting each other at A.
  3. Join BA and CA and we get the required triangle ∆ABC.
  4. Draw a ray BX from B downwards to make an acute angle ∠CBX.
  5. Now, mark seven points B1, B2, B3 ... B7 on BX, such that BB1 = B1B2 = B2B3 = B3B4 = B4B5 = B5B6 = B6B7.
  6. Join B3C and draw a line B7C’ || B3C from B7 such that it intersects the extended line segment BC at C’.
  7. Draw C’A’ || CA in such a way that it intersects the extended line segment BA at A’.

Then, ∆A’BC’ is the required triangle whose sides are `7/3` of the corresponding sides of ∆ABC.

According to the question,

We have,

Segment B6C’ || B3C.

But it is clear in our construction that it is never possible that segment B6C’ || B3C since the similar triangle A’BC’ has its sides `7/3` of the corresponding sides of triangle ABC.

So, B7C’ is parallel to B3C.

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Chapter 10: Construction - Exercise 10.2 [Page 115]

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NCERT Exemplar Mathematics [English] Class 10
Chapter 10 Construction
Exercise 10.2 | Q 2 | Page 115

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