Hip Roof Area Formula

Equation for calculate hip roof area is,

H = (B x tan α) / 2
Common Rafters = B / (2 x cos α)
Hip Rafters = √(H² +(B² / 2))
Hip Roof Area = 2 x Common Rafters x Roof Base Length

H = Roof Rise
B = Roof Base Width
α = Roof Pitch
tan = Tangent
cos = Cosine