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Exercise - 6.1

Question-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)

Solution :-
(i) Similar
(ii) Similar
(iii) Equilateral
(iv) (a) Equal 
     (b) Proportional
    

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

Solution :-
(i) (a)Two Equilateral triangles with sides 1 cm and 2 cm
    triangle
    (b)Two Squares with sides 1 cm and 2 cm
    square
    
(ii) (a)Trapezium & Square
    quadrilateral
     (b)Triangle and Paralleogram
    quadrilateral
    

Question-3 :-  State whether the following quadrilaterals are similar or not: quadrilateral

Solution :-
  Quadrilateral PQRS and ABCD are not similar because their corresponding sides are proportional, 
  i.e, 1:2 but their corresponding angles are not equal.
    
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