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SELECT CASE WHEN A + B > C AND A+C>B AND B+C>A THEN
CASE WHEN A = B AND B = C THEN 'Equilateral'
WHEN A = B OR B = C OR A = C THEN 'Isosceles'
WHEN A != B and B != C and A != C THEN 'Scalene'
END
ELSE 'Not A Triangle'
END FROM TRIANGLES;
Small suggestion:- For Scalene triangle, no two sides must simultaneously be equal. So, A != B and B != C and A != C might be the complete condition.
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Type of Triangle
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SELECT CASE WHEN A + B > C AND A+C>B AND B+C>A THEN CASE WHEN A = B AND B = C THEN 'Equilateral' WHEN A = B OR B = C OR A = C THEN 'Isosceles' WHEN A != B and B != C and A != C THEN 'Scalene' END ELSE 'Not A Triangle' END FROM TRIANGLES;
Small suggestion:- For Scalene triangle, no two sides must simultaneously be equal. So, A != B and B != C and A != C might be the complete condition.