Which one of the following sets of numbers represents the lengths of the sides of a right triangle?

(Points : 4)
9, 40, 42
5, 12, 13
6, 9, 10
13, 35, 37

Question

Which one of the following sets of numbers represents the lengths of the sides of a right triangle?

(Points : 4)
       9, 40, 42
       5, 12, 13
       6, 9, 10
       13, 35, 37

welshfella · Answer

see if they fit the pythagoras theorem
c^2 = a^2 + b^2   where c is the hypotenuse ( the longest side ) of the triangle

welshfella · Answer

for example lets look at no 3:-

longest side = 10

10^2 = 100

9^2 = 81
6^2  = 36

add      117

100 is not equal to 117 so  3 is not a right angled triangle

welshfella · Answer

do you get the idea?

anonymous · Answer

sorry this alot hard for me. can you tell me witch is it