Rumus-rumus belah ketupat luas L = a ⋅ t = d 1 ⋅ d 2 2 keliling K = 4 ⋅ a = 2 ⋅ d 1 2 + d 2 2 tinggi t = a ⋅ sin α 1 = a ⋅ sin α 2 diagonal d 1, 2 = a ⋅ 2 − 2 ⋅ cos α 1, 2 sudut α 1 + α 2 = 180 ∘ lingkaran dalam (jari-jari) r = t 2 Skor ★ ★ ★ ★ ★
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rumus luas selimut prisma belah ketupat
