Let U be the set of all triangles in a plane. If A is the set of a | Filo
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Class 11

Math

Co-ordinate Geometry

Sets

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Let U be the set of all triangles in a plane. If A is the set of all triangles with at least one angle different from , what is A'?

Solution: - Set of all triangles in a plane
- Set of triangles with at least one angle different from i.e. the set cannot have equilateral triangles

So, is the set of all equilateral triangles. 
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