that is the sum of the interior angles of a triangle,or the 3 sided polygons
A-2 (the top & left side)
B-yes (they are all on plane W)
Answer:
x=+/- root 5..................
<u>Weight : </u>
<em>⇒ x for 6 people</em>
<em>⇒ y for the 7th person</em>
<u>The correct answer is B).</u>