And tibial tuberosity, the two lines drawn from the Center to klangkraduk patella will be 2 lines intersecting perspective q-angle, then use the Magnifier magnifying Quad drive at sep.
And the second line drawn from the center of the patella to the tibial tuberosity to the two lines intersect, then an angle q-angle protractor to measure angles Quadra Drive concept at them.
And the second line drawn from tibial tuberosity to center the patella to 2 lines intersecting lines was Q-angle angle then the wood protractor angle Quad drive เซ็ปส์ at.