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 :)
Scalene Triangle - A triangle that has no sides of equal length
4 5/8
you see how many time 8 goes into 37 which is 4 and then you have 5 left over
