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Triangles : Exercise - 6.1 (Mathematics NCERT Class 10th)

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Q.1    Fill in the blanks using the correct word given in brackets :
              (i) All circles are ____ (congruent, similar)
              (ii) All squares are ____ (similar, congruent)
              (iii) All ____ triangles are similar. (isosceles, equilateral)
              (iv) Two polygons of the same number of sides are similar, if
                (a) their corresponding angles are ___ and
                (b)their corresponding sides are ___ (equal , proportional)


(i) similar
(ii) similar
(iii) equilateral
(iv) equal, proportional

Q.2      Give two different examples of pair of
                  (i) similar figures
               (ii) non-similar figures.


(i) Two different examples of pair of similar figures are :
    (a) any two rectangles (b) any two squares
(ii) Two different examples of pair of non-similar figures are :
    (a) a scelene and an equilateral triangle.
    (b) an equilateral triangle and a right angle triangle

Q.3       State whether the following quadrilaterals are similar or not :

Sol.          On looking at the given figures of the quadrilaterals, we can say that they are not similar.

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