Answer:
d
Step-by-step explanation:
Last option it should be
4/15
5 vertices
At base = 4 vertices
On top = 1 vertex
Total = 5 vertices
I really hope this helps
120
Angles opposite to equal sides are equal .
30 + 30 + x = 180 {Angle sum property of triangle}
60 + x = 180
x = 180 - 60
x = 120