Answer:
D. 5 cm and 16 cm
Step-by-step explanation:
In a triangle, the sum of the lengths of any two sides must be greater than the length of the third side.
The sum of the two lengths given must be greater than 19 cm.
A.
7 cm + 11 cm = 18 cm
18 cm < 19 cm
No triangle
B.
8 cm + 8 cm = 16 cm
16 cm < 19 cm
No triangle
C.
7 cm + 12 cm = 19 cm
19 cm = 19 cm
No triangle
D.
5 cm + 16 cm = 21 cm
21 cm > 19 cm
There is a triangle.
