could someone please help me? will fan.

Which set of side lengths defines a right triangle?

A.
7, 9, 13

B.
5, 12, 14

C.
8, 15, 17

D.
9, 12, 14

Question

could someone please help me? will fan.

Which set of side lengths defines a right triangle?
 
 A.
7, 9, 13
 
 B.
5, 12, 14
 
 C.
8, 15, 17
 
 D.
9, 12, 14

hartnn · Answer

the one which satisfies the Pythagoras theorem

hartnn · Answer

$\Large a^2+b^2 = c^2$

where c = hypotenuse is the largest of the sides

hartnn · Answer

so for example,
lets take 5,12,14

14 is largest
so you will check whether 
$14^2$ 
equals $5^2+12^2$ 
or not?

$25+ 144 = 169 \ne 196$
so 5,12,14 does NOT define a right triangle

hartnn · Answer

try it for other options

anonymous · Answer

im working them out on paper 

so far i don't think it's a either

hartnn · Answer

right its not a
try c

anonymous · Answer

i think it's c actually

because 8*8=64 and 15*15=225 and when you add those together you get 289 
and 17*17 is 289

hartnn · Answer

$\huge \checkmark$
good! :)

anonymous · Answer

thank you so much for your help!

hartnn · Answer

welcome ^_^