Property 9
\(\text{Isosceles triangle}\)
\(\lvert AB\rvert=\lvert AC\rvert\)
\(m\left(\widehat B\right)=m\left(\widehat C\right)=\alpha\)
1.
\(\Rightarrow\alpha=?\)
2.
\(\Rightarrow\alpha=?\)
3.
\(\Rightarrow\alpha=?\)
4.
\(\Rightarrow\alpha=?\)
5.
\(\Rightarrow\alpha=?\)
6.
\(\Rightarrow\alpha=?\)
7.
\(\lvert AB\rvert=\lvert AC\rvert\)
\(\lvert AD\rvert=\lvert BD\rvert\)
\(\Rightarrow\alpha=?\)