Answer:
Do you have any answer choices?
Step-by-step explanation:
Answer:
10
Step-by-step explanation:
one interior angle in a pentagon is 108^o.
5 interior angles are 540^o.
If we add 12+7+16+9+10, we get 54x=540^o
That means x=10
Answer:5/7, 2/3, 3/5
Step-by-step explanation: