Q.

How many lines of symmetry are there in an isosceles triangle? 

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a

Infinite

b

3

c

2

d

1

answer is A.

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Detailed Solution

A triangle with two sides and two angles equal is called an isosceles triangle. 

An isosceles triangle has a single line of symmetry as shown below:

Question Image

 

Hence, option A is correct.

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How many lines of symmetry are there in an isosceles triangle?