Use euler’s formula to find the missing number.
edges: 49
faces: 21
vertices: ?

30
32
26
28

Option 1st is correct

number of vertices = 30

Step-by-step explanation:

Let e be the number of edges, f be the number of faces and v be the number of  vertices.

As per the statement:

Number of edges(e) = 49

Number of faces(f) = 21

We have to find number of vertices.

using Euler's formula:

then;

⇒

Add 28 to both sides we have;

Therefore, the number of vertices = 30

1,150 give brainliest

step-by-step explanation

2r= 2300

r =1150