Question

which of the following describe an angle with a vertex at e? check all that apply: ∠efd, ∠fed, ∠def, ∠dfe

Explanation:

To determine an angle with vertex at \( E \), we recall that the vertex of an angle is the middle letter in the angle notation. For \(\angle FED\), the middle letter is \( E \), so the vertex is \( E \). Similarly, for \(\angle DEF\), the middle letter is \( E \), so the vertex is \( E \). For \(\angle EFD\) and \(\angle DFE\), the middle letter is \( F \), so their vertex is \( F \), not \( E \).

Answer:

$\angle FED$, $\angle DEF$