no 22 23 dongg pke cara yaaa bantuuu yg baik hati
Matematika
shenlyn
Pertanyaan
no 22 23 dongg pke cara yaaa bantuuu yg baik hati
1 Jawaban
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1. Jawaban newwiguna
22. Luas Segitiga ABC = 1/2 x a x t
= 1/2 x AB x AC
= 1/2 x (AE+BE) x (AD+DC)
= 1/2 x (5cm + 11cm) x (5cm + 7cm)
= 1/2 x 16 cm x 12 cm
= 96 cm²
Luas Segitiga ADE = 1/2 x a x t
= 1/2 x AE x AD
= 1/2 x 5 cm x 5 cm
= 12,5 cm²
Luas BCDE = Luas ABC - Luas ADE
= 96 cm² - 12,5 cm² = 83,5 cm² (B)
23. hipotenusa bidang segitiga = √12² + 5² = √144 + 25 = √169 = 13 cm
keliling daerah yang diarsir =
3 cm + 13 cm + 7 cm + 15 cm + 12 cm = 50 cm (B)