Question

in the triangular pyramid shown below, which lines are intersecting?

Explanation:

Step1: Recall the definition of intersecting lines

Intersecting lines are lines that meet at a point.

Step2: Analyze each pair

• For \(\overleftrightarrow{RS}\) and \(\overleftrightarrow{TU}\): They do not meet at a common point.
• For \(\overleftrightarrow{RT}\) and \(\overleftrightarrow{SU}\): They do not meet at a common point.
• For \(\overleftrightarrow{ST}\) and \(\overleftrightarrow{SU}\): They meet at point \(S\).
• For \(\overleftrightarrow{RU}\) and \(\overleftrightarrow{ST}\): They do not meet at a common point.

Answer:

\(\overleftrightarrow{ST}\) and \(\overleftrightarrow{SU}\)