Property 3
\(d_1\parallel d_2\)
\(a+b+c=360^\circ\)
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 4
\(d_1\parallel d_2\)
\(a+b+c+d=540^\circ\)
1.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)
2.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)
3.
\(d_1\parallel d_2\)
\(\Rightarrow \alpha=?\)