3. choose the correct answer.
which lines are concurrent?
$ \overleftrightarrow { m q } $ and $ \overleftrightarrow { p t } $
$ \overleftrightarrow { r s } $ and $ \overleftrightarrow { p t } $
$ \overleftrightarrow { r s } $ and $ \overleftrightarrow { o s } $
$ \overleftrightarrow { r s } $ and $ \overleftrightarrow { m q } $

Question

Accepted Answer

# Explanation:
## Step1: Recall the definition of concurrent lines
Concurrent lines are lines that pass through the same point.
## Step2: Analyze each option
- For $\overleftrightarrow{MQ}$ and $\overleftrightarrow{PT}$: These lines are parallel (since $MQ\perp QA$ and $PT\perp PA$ and $QA\parallel PA$ in the cube - like structure), so they do not intersect.
- For $\overleftrightarrow{RS}$ and $\overleftrightarrow{PT}$: These lines are skew (not parallel and not intersecting in 3 - D space).
- For $\overleftrightarrow{RS}$ and $\overleftrightarrow{OS}$: These lines intersect at point $S$.
- For $\overleftrightarrow{RS}$ and $\overleftrightarrow{MQ}$: These lines are parallel (since $MQ$ and $RS$ are both perpendicular to the vertical edges of the cube - like structure in their respective planes).

# Answer:
$\overleftrightarrow{RS}$ and $\overleftrightarrow{OS}$

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QUESTION IMAGE

Question

Explanation:

Step1: Recall the definition of concurrent lines

Step2: Analyze each option

Answer: