Question

1. select all that apply:

a point is

• ab
• b
• b
• \overleftrightarrow{pj}

Explanation:

Analyze geometric notation conventions

In geometry, specific naming conventions are used to distinguish between different geometric figures:

• Points are named using a single capital letter (e.g., \(A\), \(B\), \(P\)).
• Lines are named using a single lowercase letter (e.g., \(l\), \(m\), \(b\)) or by two capital letters representing points on the line with a double-headed arrow above them (e.g., \(\overleftrightarrow{AB}\)).
• Line segments are named using two capital letters representing their endpoints, sometimes with a bar above them (e.g., \(AB\) or \(\overline{AB}\)).
• Rays are named using two capital letters with a one-headed arrow above them (e.g., \(\overleftrightarrow{PJ}\) is actually a line notation, or \(\overrightarrow{PJ}\) for a ray).

Evaluate each option

• Option 1: \(AB\) represents a line segment or the distance between points \(A\) and \(B\). This is not a point.
• Option 2: \(B\) is a single capital letter, which is the standard notation used to represent a point.
• Option 3: \(b\) is a single lowercase letter, which is typically used to represent a line or a dimension, not a point.
• Option 4: \(\overleftrightarrow{PJ}\) represents a line passing through points \(P\) and \(J\). This is not a point.

Identify the correct choice

Based on the standard conventions of geometric notation, only a single capital letter represents a point. Therefore, \(B\) is the correct choice.

Answer:

• (A) AB
• (B) B (Correct answer)
• (C) b
• (D) \(\overleftrightarrow{PJ}\)