Question

in the square pyramid shown below, which lines are intersecting? select all that apply.

Explanation:

Step1: Recall intersecting lines definition

Intersecting lines share a common point.

Step2: Analyze each pair

• For $\overleftrightarrow{PT}$ and $\overleftrightarrow{RT}$, they meet at point $T$.
• For $\overleftrightarrow{QR}$ and $\overleftrightarrow{ST}$, they are skew - no common point.
• For $\overleftrightarrow{PQ}$ and $\overleftrightarrow{ST}$, they are skew - no common point.
• For $\overleftrightarrow{PQ}$ and $\overleftrightarrow{RT}$, they are skew - no common point.

Answer:

$\overleftrightarrow{PT}$ and $\overleftrightarrow{RT}$