NCERT10th MathematicsExercise 6.1Topic: 6 Triangles
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EXERCISE 6.1
Q1. Fill in the blanks using the correct word given in brackets :
(i) All circles are _________. (congruent, similar)
Ans: similar, "All circles are similar".
(ii) All squares are_________ . (similar, congruent)
Ans: similar, "All squares are similar".
(iii) All _________ triangles are similar. (isosceles, equilateral)
Ans: similar, "All equilateral tringles are similar".
(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)
Ans: a) equal, b) proportional,
"Two polygons of the same number of sides are similar, if
(a) their corresponding angles are equal and
(b) their corresponding sides are proportional.
2. Give two different examples of a pair of
(i) similar figures. (ii) non-similar figures.
Solution:
(i) similar figures:
a) All equilateral tringles are similar.
b) All squares are similar.
(ii) non-similar figures:
a) Equilateral tringle and isosceles traingle are non-similar.
b) Square and rectangle are non-similar.
3. State whether the following quadrilaterals are similar or not:
Ans: No, these quadrilaterals are not similar.
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