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True for all rotations about the origin are... 1. Angles are taken to angles of the SAME measure. 2. Perpendicular lines are taken to SAME perpendicular lines 3. Parallel lines are taken to SAME parallel lines 4. Line segments are taken to line segment of the SAME length. BIG IDEAS Rotate the right triangle 90 degree about point A to form image triangle A'B'C'. What is the measures of angle A'? What is the measures of angle C'? What is the measures of angle B'? degrees degrees degrees Rotate the right triangle 90 degree about point A to form image triangle A'B'C'. What is the measures of angle A'? What is the measures of angle C'? What is the measures of angle B'? degrees degrees degrees Rotate the right triangle 90 degree about point A to form image triangle A'B'C'. What is the length of A'C'? What is the length of C'B'? What is the length of A'B'? |