A solid has 12 vertices and 30 edges. How many faces does it have?
Answer & explanation
Correct answer: option 4
Vertices (v) - Edges (e) + Faces (f) = 2
⇒ v - e + f = 2
Here, v = 12 and edges = 30
Thus,
⇒ 12 - 30 + f = 2
⇒ f - 18 = 2
⇒ f = 20
A solid has 12 vertices and 30 edges. How many faces does it have?
Correct answer: option 4
Vertices (v) - Edges (e) + Faces (f) = 2
⇒ v - e + f = 2
Here, v = 12 and edges = 30
Thus,
⇒ 12 - 30 + f = 2
⇒ f - 18 = 2
⇒ f = 20