Square
    {{{ errors }}}
side length: a
diagonal length: c
diagonal length: L
θ in degrees: θ
perimeter square: Ps
surface area square: SAs
perimeter triangle: Pt
semiperimeter triangle: s
surface area triangle: SAt
radius circumcircle: R
circumference of circumcircle: Cc
surface area circumcircle: SAc
radius incircle: r
circumference incircle: Cic
surface area incircle: SAic