Take any three sticks of 6cm, 5cm, 4cm, 3cm and 2cm in length to make different triangles?

Take any three sticks of 6cm, 5cm, 4cm, 3cm and 2cm in length to make different triangles?

Just the first side + the second side > the third side
For example:
∵4+5=9 9>6
4.5.9 can form a triangle
It's all done in this way

If the two sides of the triangle are 3 and 5, then the perimeter of the triangle connected to the midpoint of the three sides of the triangle may be ()
A. 5.5B. 5C. 4.5D. 4

Let the three sides of a triangle be a, B and C respectively, so that a = 3, B = 5, 2 < C < 8, 10 < perimeter of triangle < 16, 5 < perimeter of midpoint triangle < 8

If the two sides of the triangle are 3 and 5, then the perimeter of the triangle connected to the midpoint of the three sides of the triangle may be ()
A. 5.5B. 5C. 4.5D. 4

Let the three sides of a triangle be a, B and C respectively, so that a = 3, B = 5, 2 < C < 8, 10 < perimeter of triangle < 16, 5 < perimeter of midpoint triangle < 8