2. Which of the following sets of sides will NOT form a right angled triangle? a) sides 13cm, 12cm, and 5cm.
b) sides 3cm, 4cm, and 5cm.
c) sides 8cm, 6cm, and 10cm.
d) sides 15cm, 12cm, and 8cm​

dont trust me im no expert these losers made me fail a test bro this sucks

step-by-step explanation:

sorry man i accidentally pressed yes my bad

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4