Answer:
3
Step-by-step explanation:
I gussed but I'm not sure
Answer:
I have no clue but this was two years ago so hopefully you know the answer by now
Step-by-step explanation:
yes
Answer:
S = a² => 20 = a² => a = √20 ≈ 4.5 cm
Step-by-step explanation:
9cm
Imagine there are 2 triangles solve for one 3*3=9\2=4.5
Then add
4.5+4.5=9