Measurement of antinuclear antibodies (ANAs) in serum is the most commonly performed screening test for patients suspected of having a systemic rheumatic disease, also referred to as connective tissue disease.(1) ANAs occur in patients with a variety of autoimmune diseases, both systemic and organ-specific.
How do you rotate a figure 180 degrees in anticlockwise or clockwise direction on a graph? Rotation of a point through 180Â°, about the origin when a point M (h, k) is rotated about the origin O through 180Â° in anticlockwise or clockwise direction, it takes the new position M' (-h, -k).Worked-out examples on 180 degree rotation about the origin:n plotting the points P (-3, 1) and Q (2, 3) on the graph paper to get the line segment PQ. Now rotate PQ through 180Â° about the origin O in anticlockwise direction, the new position of points P and Q is: P (-3, 1) â P' (3, -1). Q (2, 3) â Q' (-2, -3). Thus, the new position of line segment PQ is P'Q'.
1. Plot the point M (-2, 3) on the graph paper and rotate it through 90Â° in clockwise direction, about the origin. Find the new position of M. Solution: When the point is rotated through 90Â° clockwise about the origin, the point M (h, k) takes the image M' (k, -h).Therefore, the new position of point M (-2, 3) will become M' (3, 2).otation of point through 90Â° about the origin in clockwise direction when point M (h, k) is rotated about the origin O through 90Â° in clockwise direction. The new position of point M (h, k) will become Mâ (k, -h). Worked-out examples on 90 degree clockwise rotation about the origin: