Gmana cara mencari luas daerah berbayang?di luas gabungan bagun datar,,,itu luas 1/2 lingkaran + luas 1/2 belah ketupat..rumusnya jga
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L 1/2 lingkaran = 1/2 × π × r × r
= 1/2 × 22/7 × 7 × 7 dm²
= 77 dm²
L ∆ = 1/2 × a × t
= 1/2 × 14 × 4 dm²
= 28 dm²
L berbayang = 77 dm² + 28 dm²
= 105 dm²