4. in the adjoining figure, abcd is a
parallelogram in which la = 60°. if the
bisectors of za and b meet dc at p,
prove that (i) zapb = 90°, (ii) ad = dp and
pb = pc = bc, (iii) dc = 2ad.

The image of abc is a'b'c. what transformations would result in this image? abc is reflected over the line x = 1, then is rotated -90° around the origin. abc is reflected over the line y = x - 1, then t: (x, y) → (x - 1, y - 1). abc is rotated 90° around the origin, then is reflected over the y-axis. abc is rotated -90° around the origin, then is reflected over the line y = -1.