Yes or no or can not be formed or can be formed
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Yes, all these can be formed
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1) a = 15cm , b = 20cm , C = 25 cm
a² = 225 , b² = 400 , c ² = 625
this c² = a²+b² hence it is a right angled triangle.
2) a = 9 cm , b=12cm , c = 16 cm
a² = 81, b² = 144 , c = 256
Here a²+b² ≠ c²
thus it is not a right angled triangle
3) a = 10cm , b=24 cm , c = 26cm
a² = 100, b² = 576 ,c² = 676
here a²+b² = c²
hence it is a right angled triangle
a² = 225 , b² = 400 , c ² = 625
this c² = a²+b² hence it is a right angled triangle.
2) a = 9 cm , b=12cm , c = 16 cm
a² = 81, b² = 144 , c = 256
Here a²+b² ≠ c²
thus it is not a right angled triangle
3) a = 10cm , b=24 cm , c = 26cm
a² = 100, b² = 576 ,c² = 676
here a²+b² = c²
hence it is a right angled triangle
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