# Q4.    Given of length 3.9 cm, construct such that the length of is twice that of . Verify by measurement.(Hint: Construct such that length of = length of ; then cut off such that also has the length of .)

The steps of constructions are following:

(i) Draw a line ′l′.

(ii) Construct  such that length of  = length of

(iii) Then cut of  such that  also has the length of  .

(iv) Thus the length of   and the length of  added together make twice the length of .

Verification:

By measurement we find that PQ = 7.8 cm

= 3.9 cm + 3.9 cm =    =

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