Question

Yes or no or can not be formed or can be formed

Answer 1

Yes, all these can be formed
I hope it helped you

Answer 2

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