Find the length of the hypotenuse of a right triangle with legs of 9 cm and 12 cm.
A.8cm
B.21cm
C.15 cm
D.225cm
3 answers
i think its 21
9^2+12^2= 255
sqrt 255
= C. 15
sqrt 255
= C. 15
15^2 = 225, not 255
but 15 is correct.
Remember your basic 3-4-5 right triangle?
scale it up by a factor of 3 and you get 9-12-15
but 15 is correct.
Remember your basic 3-4-5 right triangle?
scale it up by a factor of 3 and you get 9-12-15
29 answers