Question

Which lengths could be the sides of a triangle?
A.

17 cm, 5 cm, 13 cm

B.

5 cm, 17 cm, 12 cm

C.

20 cm, 15 cm, 4 cm

D.

15 cm, 20 cm, 3 cm

Answer 1

The sum of the smaller sides exceeds the larger side...
A --> 13 + 5 = 18 --> 18>17 --> triângulo

Answer 2

The answer is A. 17 cm, 5 cm, 13 cm

For the triangle:
a+b > c
b+c > a
a+c > b

Check all choices:
A. 17 cm, 5 cm, 13 cm
a = 17
b = 5
c = 13
17+5 = 22
22 > 13
5+13= 18
18 > 17
17+13=30
30>5

If you check other choices, you will see they are incorrect.