A plane intersects a rectangular pyramid horizontally as shown. Describe the cross-section. A) circle Eliminate B) rectangle C)
2 answers:
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Answer with Step-by-step explanation:
We are given that A, B and C are subsets of universal set U.
We have to prove that
Proof:
Let x
Then and
When then
but
Therefore, but
Hence, it is true.
Conversely , Let but
Then and
When then
Therefor,
Hence, the statement is true.