Question

name all the angles that have v as a vertex.
13)
14)
15)
16)

Explanation:

Step1: Identify angles at vertex V in 13

Angles are formed by two rays with a common endpoint. For the figure in 13 with vertex V, the angles are $\angle HVJ$, $\angle HV I$, $\angle IVJ$.

Step2: Identify angles at vertex V in 14

In figure 14 with vertex V, the angles are $\angle DV E$, $\angle DV F$, $\angle EV F$.

Step3: Identify angles at vertex V in 15

For the figure in 15 with vertex V, the angles are $\angle RV T$, $\angle RV S$, $\angle SV T$.

Step4: Identify angles at vertex V in 16

In figure 16 with vertex V, the angles are $\angle DV E$, $\angle DV F$, $\angle EV F$, $\angle EV D$, $\angle FV D$, $\angle FV E$.

Answer:

1. $\angle HVJ$, $\angle HV I$, $\angle IVJ$;
2. $\angle DV E$, $\angle DV F$, $\angle EV F$;
3. $\angle RV T$, $\angle RV S$, $\angle SV T$;
4. $\angle DV E$, $\angle DV F$, $\angle EV F$, $\angle EV D$, $\angle FV D$, $\angle FV E$