In the earring design described above, there are 4 equilateral triangles. The surface area is calculated by solving for the area of a single triangle and multiplying the answer by 4. The area of an equilateral triangle is calculated by the equation, A = ((√3)/4)s² Substituting 14 to s and multiplying the answer by 4 SA = √3 x (14 mm)² = 339.48 mm² Thus, the surface area of the earring is approximately 339.48 mm².
