You can tell if lines are perpendicular or not by seeing if meet in a right angle. A right angle is like a square, and the lines would have to be 90 degrees.
One example is when the two lines (horizontal and vertical) meet each other at the ends.
(You MUST make sure that they are directly horizontal and vertical. If not, they will either be acute or obtuse).
I hope this helped!
actually none of them since 212 is the biggest number and should be at the end but none of the answers say so
Answer:
approx 58 yard we can determine it by pithagoras theorem
53+53+53+53+53+53=318
if you add 53 six times you get 318
