Property 7
\(d_1\parallel d_2\)
\(\Rightarrow\alpha=a+b\)
1.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)
2.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)
3.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)
Property 8
\(d_1\parallel d_2\)
\(a+b+c=x+y\)
1.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)
2.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)
3.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)