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Kelas : VIIMapel : Matematika
Kategori : Segiempat
Kata Kunci; Sudut, jajargenjang
Pada jajargenjang, sudut yang berhadapan sama besar.
∠A=∠C
(3y+5) = (y+23)
3y - y =23 -5
2y = 18
y = 18/2 = 9°
∠A = 3.9 + 5 =27 + 5 = 32
Soalnya: seharusnya C = y + 23