Question

the scalene triangle has 40 cm as it's perimeter and whose two sides are 13 cm and 15cm find the third side
​

Answer 1

Answer:

12

Step-by-step explanation:

$40 = 13 + 15 + x \\40 = 28 + x \\ 40 - 28 = x \\12 = x \\ answer \: is12$