Base Edge Surface Area Heptagonal Prism Formula

Equation for calculate base edge surface area heptagonal prism is,

a = ( √ ( 49 * h² + 14 * A * cot ( 180° / 7 ) ) - 7 * h ) * ( tan ( 180° / 7 ) / 7 )

Where,
a = Base Edge
A = Surface Area
h = Height