a regular tetrahedron has four faces, each an equilateral triangel of the same size?

Question

suppose the edge lenght is 2. how many edges are there? how many vertices are there?
a) find the total surface area
b) find the total lenght of all edges

Answer 1

6 edges, 4 vertices

total surface area = 4 * 0.5 * 2 * (sqrt 3) = 4 sqrt 3

length of all edges = 2, so the total length is 2 * 6 = 12