Question

Tolong Dijawab Kak Besok Mau Dikumpul....

Answer 1

Verified answer

Kelas 7 Matematika
Bab Garis dan Sudut

∠DAB = 7c (bertolak belakang)
∠ADC = 11c (bertolak belakang)

∠BCD = 180°- ∠ABC
∠BCD = 180° - 5c

∠DAB + ∠ADC + ∠BCD + ∠ ABC = 360°
7c + 11c + 180° - 5c + 5c = 360°
18c = 360° - 180°
c = 180°/18
c = 10°

∠BCD
= 180° - 5c
= 180° - 5 . 10°
= 180° - 50°
= 130°

Answer 2

Verified answer

→ Mapel : Math
→ Materi : Sudut
→ Bab : Garis dan Sudut
————————————————

180° = 11c + 7c
180° = 18c
c = 180 ÷ 18
c = 10°

Besar sudut ABC
= 5c
= 5(10)
= 50°

Maka,
Besar sudut BCD
= 180° - Besar sudut ABC
= 180° - 50°
= 130°

Maaf Kalau Salah :"