Question

Answer #8 that can be seen on the picture please.

Answer 1

Since it is an isosceles triangle, the two sides TD and DO are equal. This implies that:

`\begin{gathered} TD^2+TD^2=TO^2 \\ \Rightarrow2TD^2=14^2^{}=196 \\ \Rightarrow TD^2=(196)/(2)=98^{} \\ \Rightarrow TD=\sqrt[]{98}=\sqrt[]{7\cdot7\cdot2} \\ TD=7\sqrt[]{2} \end{gathered}`

Therefore:

`DO=7\sqrt[]{2}`