Verified Answer :

olemakpadu

24,  32 ,  40.           Divide through by 8

3,    4,    5,            

The 3 , 4, 5 reminds of the Pythagorean triple, which is a right angled triangle.

So a triangle with sides 24, 32, 40 is a right angled triangle.

Option A.

meerkat18

To answer the question above, take note of the relationship between the square of the longest side to that of the sum of the square of the two shorter sides.
                                    a² + b² _ c²
                           24² + 32² = 1600    ; 40² = 1600
Since they are equal, the triangle formed is a right triangle. 

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