You first have to find the length of each side.
AB=4
BC=4
CD=4
AD=4
Since this is a quadrilateral, two sides will have the same length, in this case, they all do so you can pick any two sides.
4(4)=16.
Answer:
cos 67 and sin 23........
Answer:
66.3720930233
Step-by-step explanation:
120° is the correct answer<span />
