ada yg tau nggk,kalo tau jwb yg klo nggak tau juga nggkpp thanks

Mapel : Matematika
Materi : Garis dan Sudut
Kelas : 7

Nomor 1]

a] Sudut BOC

BOC = 180° - AOC
BOC = 180° - 105°
BOC = 75°

b] Sudut AOC

AOC = 180° - BOC
AOC = 180° - 82°
AOC = 98°


Nomor 3]

a] Nilai a dan b

⏩Gambar DEFGH

2a + 68° = 180°
2a = 180° - 68°
2a = 112°
a = 112°/2
a = 56°

⏩Gambar KLMN

5b + 2b + 12° = 180°
7b = 180° - 12
7b = 168°
b = 168°/7
b = 24°


b] Besar Sudut DEG dan KLN

⏩Sudut DEG
= 68° + a
= 68° + 56°
= 124°

⏩Sudut KLN
= 5b + 12°
= 5(24°) + 12°
= 120° + 12°
= 132°


Nomor 8]

a] Nilai p dan q

⏩Gambar ABCDE
2p + 36° = 90°
2p = 90° - 36°
2p = 54°
p = 54°/2
p = 27°

⏩Gambar PQRST
3q + 2q + 90° = 180°
5q = 180° - 90°
5q = 90°
q = 90°/5
q = 18°

semoga membantu.......