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The union of all straight lines - IMO LongList 1987
Source:
9/6/2010
Two moving bodies
M
1
,
M
2
M_1,M_2
M
1
,
M
2
are displaced uniformly on two coplanar straight lines. Describe the union of all straight lines
M
1
M
2
.
M_1M_2.
M
1
M
2
.
geometry unsolved
geometry
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