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t segitiga QRS = √10²-6² = √100-36 = √64 = 8 cm
Lsegitiga PQS =( a×t)/2 = (24 × 10)/2 = 240/2 = 120 cm²
Lsegitiga QRS = (a×t)/2 = (6×8)/2 = 48/2 = 24 cm²
jadi, luas bangun PQRS = LsegitugaPQS+LsegitigaQRS = 120 + 24 = 144 cm²
1. cari sisi tegak dari segitiga siku-siku besar
= [tex] 26^{2} - 24^{2}
= 676-576 = 100
= \sqrt{100} = 10
cari luas: a x t/2
= 10 x 24/ 2 =120 cm2
2. cari sisi tegak dari segitiga siku-siku kecil
= [tex] 10^{2} - 6^{2}
= 100 - 36
= \sqrt{64}= 8
cari luas: a x t/2
= 8 x 6/2 = 24 cm2
3. luas bangun PQRS adalah 120 cm2 + 24 cm2
= 144 cm2