<span>B. {-5,-4,-3…. }
............</span>
36
a= 1/2 b x h
= 5cm x 72cm
= 360cm
The answer you are looking for is -17/44
It is true because if a is perpendicular to b and b is perpendicular to c therefore a has to be perpendicular to c also they said that all three lines are coplanar therefore the statement must be true
I hope this helped you out :)
