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Question 5

In an isosceles triangle, one angle is 70. The other two angles are of

i) 55 and 55
ii) 70 and 40
iii) Any measure

In the given option(s) which of the above statement(s) are true?

a) (i) only
b) (ii) only
c) (iii) only
d) (i) and (ii)


Solution

As we know, the sum of the interior angles of a triangle is 180

i) According to the question,
70+55+55=180


ii) According to the question,
70+70+40=180

iii) Not possible, because two angles must be equal in an isosceles triangle.
So (i) and (ii) can be possible.


Mathematics
NCERT Exemplar
Standard VII

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