The pyramid has 18 edges. How many vertices does it have? Find the circumference of a circle with a radius of 10 cm.

Since the pyramid has 18 edges, the number of vertices at the base of the pyramid will be equal to the original number of edges. That is, any intersection of the edge of a volumetric pyramid with the base is considered a vertex, we get 18. Do not forget that any pyramid has one more vertex, the point at which all its edges intersect is the highest point. Total:

18 + 1 = 19

Answer: 19 edges.

The circumference is calculated using the 2πR formula. Let’s calculate for a circle with a diameter of 10 cm:

2π10 = 20p or 20 * 3.14 … = 62.8 … cm