Find the length of the hypotenuse of a right triangle with legs of 9 cm and 12 cm.
• 8 cm
• 21 cm
• 15 cm
• 225 cm
2 answers
you should be able to recognize the familiar 3-4-5 triangle, blown up by a factor of 3.
√ ( 9² + 12² ) = √ ( 81 + 144 ) =
√ 225 = 15
√ 225 = 15