In your notebook, draw several perpendicular lines. What kind of angles are formed?
obtuse angles
acute angles
right angles

the best answer is for perpendicular lines is the right angles, because the perpendicular line is two-lines intersecting to form and upsidedown T which forms 2 right angles. I hope this helps for assignment.

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743

to complete this square you have to rotate about the origin 270 degrees clockwise.