Math
posted by Help .
2) which set of measure could be the side lengths of a right triangle?
A. 0.9 cm, 1.2 cm, 1.5 cm
B. 4 in, 4 in, 4 in
C. 7 m, 8m, 9m******
D. 2ft, 3ft, 4ft

Math 
Steve
nope. Think of your ubiquitous 345 right triangle
(A) is that same triangle, scaled by .3
It's obvious that (C) is wrong, since 7^2+8^2 = 49+64 = 113, not 9^2=81
On a question like this, even if you're guessing, at least check to make sure your answer fits!
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Which represents a reduction? A (x,y) —> (0.9x, 0.9y) B (x,y) —> (1.4x, 1.4y) C (x,y) —> (0.7x, 0.3y) D (x,y) —> (2.5x, 2.5y) 11 Which set of lengths are not the side lengths of a right triangle?