Question

i can name geometric figures. 1. which is not a correct name for the angle? a) ∠1 b) ∠pxh c) ∠phx d) ∠x

Explanation:

Step1: Recall angle - naming rules

An angle can be named by a number (∠1), by its vertex letter when there is only one angle at that vertex (∠X), or by three points with the vertex in the middle (∠PXH).

Step2: Analyze each option

• Option A: ∠1 is a valid name as it is using the number assigned to the angle.
• Option B: ∠PXH is valid as the vertex X is in the middle of the three - point name.
• Option C: ∠PHX is incorrect because the vertex of the angle is X, not H, so the middle letter in the three - point name should be X.
• Option D: ∠X is valid since there is only one angle at vertex X.

Answer:

C. ∠PHX