In the parallelogram ABCD, m and N are the midpoint of DC and BC respectively. The known vectors am = C and an = D are used to represent the vectors AB and AD
c+d=2AC
c-d=1/2BD
AD=1/2(AC-DB)=5/4c-3/4d
AB=AC-AD=5/4d-3/4c
RELATED INFORMATIONS
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- 2. In the parallelogram ABCD (Xining City, 2008), the bisector ce of angle BCD intersects the edge ad at E (Xining City, 2008) 23. As shown in Figure 10, it is known that in the parallelogram ABCD, the bisector ce of angle BCD intersects ad at e, the bisector BG of angle ABC intersects CE at F, and ad at g. verification: AE = DG
- 3. In the parallelogram ABCD, it is known that the bisector ce of ∠ BCD intersects ad at e, the bisector BG of angle ABC intersects CE at f and ad at g. the proof is AE = dg
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- 7. In square ABCD, f is the midpoint of AD, BF and AC intersect point G, then the area ratio of triangle BGC and quadrilateral CGFD is? How to write the correct procedure?
- 8. In rectangular ABCD, if f is the midpoint of AD and BF and AC intersect point G, the area ratio of triangular BGC to quadrilateral CGFD is
- 9. In square ABCD, f is the midpoint of AD, BF and AC intersect at point G, what is the area ratio of triangle BGC to quadrilateral CGFD
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