6) a = 2.1, b = 7.2, c = 7.5

Does this make a right triangle

No. a=2.1, b=7.2, c=7.5 does not equal an right triangle

yes

Step-by-step explanation:

Using the converse of Pythagoras' identity.

If the longest side squared is equal to the sum of the other 2 sides squared then the triangle is right.

longest side = 7.5, thus

7.5² = 56.25

2.1² + 7.2² = 4.41 + 51.84 = 56.25

Thus the triangle formed is right.