Question

Can a triangle be constructed with the following side lengths?
12 6 9

Answer 1

YES

Explanation:

The sum of the lengths of any two sides of a triangle is greater than the length of the third side.

12 + 6 is bigger than 9

12 +9 is bigger than 6

9+6 is bigger than 12

Answer 2

yes

Explanation:

Sides: a = 6 b = 9 c = 12

Area: T = 26.143

Perimeter: p = 27

Semiperimeter: s = 13.5