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denote respectively the sets of all equilateral, isosceles, right angled and obtuse angled triangles in a plane, then which of the following is not true
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By Expert Faculty of Sri Chaitanya
a
R∩E=ϕ,R∩I≠ϕ
b
E∩O=ϕ,O∩I≠ϕ
c
E∩I=ϕ,E∩O≠ϕ
d
E∩I≠ϕ,E⊂I
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Correct option is C
An equilateral triangle cannot be obtuse angled or right angled but is an isosceles triangle.So E⊂I and E∩I=E.
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