Question

Can the side of a triangle have lengths 2, 9 and 16

Answer 1

No because 2+9 is less than 16

Here a formula to help you:

Any two measurements in a triangle added to each other must be more than the 3rd one

Correct ex: 4,5,6. 4+5>6 6+4>5. 5+6>4


Incorrect ex: 10,5,4 10+4>5 5+10>. But 5+4<10