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Question -

If l, m, n are three lines such that l ||m and n тКе l, prove that n тКе m.



Answer -

Given : l, m, n are three lines such that l || m and n тКе l
┬а
To prove : n тКе m
Proof : тИ╡ l || m and n is the transversal.
тИ┤ тИаl = тИа2 (Corresponding angles)
But тИа1 = 90┬░ (тИ╡ nтКеl)
тИ┤ тИа2 = 90┬░
тИ┤ n тКе m

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