Answer:
4
Step-by-step explanation:
in base 4
21 = (2 * 4) + (1 * 1) = 9
Answer:
not sure
Step-by-step explanation:
sorry :/
Answer:
I don't understand what you want me to do
Step-by-step explanation:
Answer: 1, 3, and 4 can form triangles. The rest can not.
Step-by-step explanation:
on triangles 1, 3, and 4, the 2 smaller sides added together are greater than the longer side.