Congruent and Similar Figures Lecture 1

“Start by doing what’s necessary; then do what’s possible; and suddenly you are doing the impossible.” —Francis of Assisi


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)


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

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

Class 10 triangles exercise 6.1 Question 3 fig


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