MathDB
3D Problem

Source: 1986 National High School Mathematics League, Exam One, Problem 4

February 24, 2020
geometry3D geometrytetrahedron

Problem Statement

None face of a tetrahedron is isosceles triangle. How many kinds of lengths of edges do the tetrahedron have at least? (A)3(B)4(C)5(D)6\text{(A)}3\qquad\text{(B)}4\qquad\text{(C)}5\qquad\text{(D)}6
Back to ProblemsView on AoPS