Which lengths would form a right triangle? 9, 12, and 14 24, 7, and 26 21, 16, and 12 30, 24, and 18

Answer 1

14^2=196 and 9^2+12^2=81+144=225 so the triple (9,12,14) does not form a right angle triangle.

26^2=676 and 7^2+24^2=49+576=625 so the triple (7,24,26) does not form a right angle triangle.

21^2=441 and 12^2+16^2=144+256=400 so the triple (12,16,21) does not form a right angle triangle.

30^2=900 and 18^2+24^2=324+576=900 and so the triple (18,24,30) does form a right angle triangle.